| 10-15 Transit | C | Iowa | 76.9 |
| 10-15 Transit | C | Iowa | 76.9 |
| 128 Business Council | F | Massachusetts | 39.1 |
| 128 Business Council | F | Massachusetts | 39.1 |
| 24 hour advance reservations required | B | Nevada | 81.4 |
| 81 Connection, CityGo, KanConnect | F | Kansas | 50.1 |
| ABQ RIDE | D | New Mexico | 61.9 |
| Academy Bus | F | New York | 42.3 |
| Access Allegany | F | New York | 42.0 |
| Addison County Transit (ACTR) | F | Vermont | 37.8 |
| Addison County Transit (ACTR) | F | Vermont | 37.8 |
| Adirondack Trailways ADP | F | New York | 45.1 |
| Adirondack Trailways NYP | F | New York | 42.5 |
| Adirondack Trailways Pine Hill Trailways | F | New York | 2.3 |
| Advance Transit | C | Vermont | 74.3 |
| Advance Transit | C | Vermont | 74.3 |
| Advance Transit (AT) | F | New Hampshire | 42.3 |
| Airport Valet Express | F | California | 44.5 |
| Airport Valet Express | F | California | 44.5 |
| Akron Metro Regional Transit Authority (METRO) | F | Ohio | 33.4 |
| Akron Metro Regional Transit Authority (METRO) | B | Ohio | 81.4 |
| Alameda-Contra Costa Transit District (AC Transit) | F | California | 52.2 |
| Albany Transit System | F | Georgia | 33.6 |
| Alcatraz Cruises - Hornblower, Angel Island Tiburon Ferry, Blue & Gold Fleet | F | California | 46.7 |
| Alcatraz Cruises - Hornblower, Angel Island Tiburon Ferry, Blue & Gold Fleet | F | California | 46.7 |
| Alcatraz Cruises Ferry | A | California | 92.2 |
| Alexandria Transit Company (DASH) | C | Virginia | 71.4 |
| Alhambra Community Transit | F | — | 47.6 |
| Alhambra Community Transit | F | California | 47.6 |
| All Points Transit | D | Colorado | 62.0 |
| All Points Transit | D | Colorado | 62.0 |
| Allegany County Transit | F | Maryland | 25.1 |
| Allen County Regional Transit Authority | C | Ohio | 79.0 |
| Altamont Corridor Express | F | California | 46.8 |
| Altavista Community Transit System | B | Virginia | 80.2 |
| Altavista Community Transit System | B | Virginia | 80.2 |
| Amador Transit | C | — | 78.8 |
| Amador Transit | C | California | 78.8 |
| Amarillo City Transit | F | Texas | 50.2 |
| Amtrak | F | — | 42.6 |
| Amtrak San Joaquins | F | — | 52.6 |
| Amtrak Vermonter | B | — | 80.1 |
| Anchorage People Mover | D | Alaska | 65.8 |
| Ann Arbor Area Transportation Authority (TheRide) | C | Michigan | 70.1 |
| Annapolis Transit | F | Maryland | 31.2 |
| Annapolis Transit | A | Maryland | 93.6 |
| Antelope Valley Transit Authority (AVTA) | F | California | 39.2 |
| Arcadia Transit | F | — | 44.7 |
| Arcadia Transit | F | California | 44.7 |
| Arcadia Transit | F | California | 57.1 |
| Areawide Community Transportation System | F | Alabama | 57.2 |
| Arlington Transit | C | Virginia | 71.1 |
| Arvin Transit | F | — | 42.3 |
| Arvin Transit | F | California | 42.3 |
| Asheville Rides Transit | F | North Carolina | 46.8 |
| Asheville Rides Transit | F | North Carolina | 46.8 |
| Astoria Riverfront Trolley | B | Oregon | 84.7 |
| Athens Public Transit | F | Ohio | 50.3 |
| Athens Public Transit | F | Ohio | 43.3 |
| Atlanta Streetcar | F | Georgia | 55.7 |
| Atlantic Station Shuttle (FREE RIDE) | F | Georgia | 39.8 |
| Atomic City Transit | B | New Mexico | 84.4 |
| Auburn Transit | F | — | 17.5 |
| Auburn Transit | F | California | 17.5 |
| Auburn Transit | D | California | 63.2 |
| Avalon Transit | F | — | 56.4 |
| Avalon Transit | F | California | 56.4 |
| Avon Transit | F | Colorado | 49.4 |
| Avon Transit | F | Colorado | 49.4 |
| Avon Transit | B | Colorado | 88.3 |
| Baca Area Transportation | C | Colorado | 73.8 |
| Baldwin Park Transit | F | — | 39.1 |
| Baldwin Park Transit | F | California | 39.1 |
| Barrie Transit (Ontario) | C | CA | 72.3 |
| Basin Transit Service (BTS) | C | Oregon | 75.5 |
| Bay Area Rapid Transit (BART) | D | California | 60.5 |
| Bay Area Transportation Authority | F | Michigan | 44.6 |
| Bay Area Transportation Authority | F | Michigan | 44.6 |
| Bay Area Transportation Authority | F | Michigan | 54.8 |
| Bay State Cruise Company | B | Massachusetts | 80.2 |
| Bay Town Trolley | F | Florida | 53.3 |
| Bay Town Trolley | F | Florida | 53.3 |
| Bay Transit | B | Virginia | 80.5 |
| Bay Transit | B | Virginia | 80.5 |
| Beach Cities Transit | D | California | 62.2 |
| Beach Cities Transit | D | — | 68.1 |
| Beaumont Transit | B | — | 84.0 |
| Beaumont Transit | B | California | 84.0 |
| Beaver County Transit Authority | F | Pennsylvania | 45.0 |
| Beaver County Transit Authority | C | Pennsylvania | 77.0 |
| Bell Gardens Trolley | F | California | 49.6 |
| Bellflower Bus | F | California | 46.7 |
| Bellflower Bus | C | — | 79.4 |
| Ben Franklin Transit | F | Washington | 55.9 |
| Ben Franklin Transit | B | Washington | 84.8 |
| Ben Franklin Transit | B | Washington | 87.9 |
| Benson Area Transit | F | Arizona | 51.7 |
| Benson Area Transit | F | Arizona | 51.7 |
| Bent County Transit | F | Colorado | 46.2 |
| Bent County Transit | F | Colorado | 46.2 |
| Benton Area Transportation | D | Oregon | 70.0 |
| Benton Area Transportation - Flex V2 | B | Oregon | 80.7 |
| Berks Area Regional Transportation Authority (BARTA) | F | Pennsylvania | 45.4 |
| Berks Area Regional Transportation Authority (BARTA) | D | Pennsylvania | 61.7 |
| Berkshire Regional Transit Authority (BRTA) | B | Massachusetts | 85.0 |
| Berkshire Regional Transit Authority (BRTA) | B | Massachusetts | 85.0 |
| Bethesda Circulator | F | Maryland | 49.9 |
| Bettendorf Transit | B | Iowa | 84.9 |
| Biddeford Saco Old Orchard Beach Transit | C | Maine | 78.9 |
| Big Blue Bus | F | California | 44.1 |
| Birmingham Jefferson County Transit Authority | F | Alabama | 19.1 |
| Birmingham Jefferson County Transit Authority (MAX) | F | Alabama | 46.0 |
| Birmingham Jefferson County Transit Authority (MAX) | F | Alabama | 34.8 |
| Birnie Bus | F | New York | 58.8 |
| Bisbee Bus | A | Arizona | 99.4 |
| Black Ball Ferry Line | A | Washington | 98.2 |
| Black Ball Ferry Line | A | Washington | 98.2 |
| Blackhawk and Central City Tramway | B | Colorado | 81.9 |
| Blackhawk and Central City Tramway | B | Colorado | 81.9 |
| Blacksburg Transit | F | Virginia | 57.4 |
| Blackstone Area Bus Service | C | Virginia | 74.8 |
| Blackstone Area Bus Service | C | Virginia | 74.8 |
| Block Island Ferry | C | Rhode Island | 77.0 |
| Block Island Ferry | C | Rhode Island | 77.0 |
| Bloom Bus | F | Massachusetts | 44.5 |
| Bloom Tours | F | Massachusetts | 46.4 |
| Bloomington Transit | F | Indiana | 32.1 |
| Bloomington Transit | C | Indiana | 75.3 |
| Blossom Express | B | — | 81.9 |
| Blossom Express | B | California | 81.9 |
| Blue & Gold Fleet | F | California | 53.9 |
| Blue Apple Bus Company | C | Massachusetts | 77.9 |
| Blue Sky Limo LLC | F | Colorado | 54.6 |
| Blue Star Bus | F | Oregon | 47.5 |
| Blue Star Bus | F | Oregon | 47.5 |
| Bluegrass Ultra-Transit Service | D | Kentucky | 63.5 |
| Bluegrass Ultra-Transit Service | D | Kentucky | 63.5 |
| Boston Express | C | — | 73.4 |
| Boston Harbor Islands Ferries | F | Massachusetts | 38.7 |
| Boston Harbor Islands Ferries | A | Massachusetts | 95.3 |
| Boston Harbor Islands Ferry | A | New York | 98.2 |
| Boulder County | F | Colorado | 48.1 |
| Boulder County | F | Colorado | 48.1 |
| Boxcar Commuter Bus | B | New Jersey | 82.4 |
| Breckenridge Free Ride | F | Colorado | 46.7 |
| Breckenridge Free Ride | F | Colorado | 46.7 |
| Breeze Transit | F | Florida | 31.7 |
| Brightline Trains LLC | C | Florida | 79.6 |
| Bristol Virginia Transit | B | Virginia | 84.0 |
| Bristol Virginia Transit | B | Virginia | 84.0 |
| Brite | F | Virginia | 35.2 |
| Brockton Area Transit Authority (BAT) | C | Massachusetts | 77.3 |
| Brockton Area Transit Authority (BAT) | C | Massachusetts | 77.3 |
| Bronx Bus | D | New York | 68.3 |
| Brooklyn Bus | D | New York | 68.3 |
| Broome County Transit (B.C. Transit) | F | New York | 38.2 |
| Broome County Transit (B.C. Transit) | F | New York | 57.6 |
| Broward County Transit | A | Florida | 90.4 |
| Buc Shuttle | F | Georgia | 39.8 |
| Buena Vista Ferry | C | Oregon | 73.3 |
| Bullhead Area Transit System | B | Arizona | 85.3 |
| Bullhead Area Transit System | B | Arizona | 85.3 |
| BurbankBus | D | — | 63.8 |
| Burlington Urban Service | C | Iowa | 75.2 |
| Burlington Urban Service | C | Iowa | 75.2 |
| Burns Paiute Tribal Transit | C | Oregon | 75.5 |
| Bus | C | California | 72.2 |
| Bus | F | New Jersey | 36.4 |
| Bus | D | Pennsylvania | 61.2 |
| Bus | F | District of Columbia | 39.9 |
| Bustang | F | Colorado | 45.7 |
| Bustang | F | Colorado | 45.7 |
| Bustang | C | Colorado | 73.4 |
| Bustang Outrider | B | Colorado | 80.7 |
| Butler County Regional Transit Authority | F | Ohio | 36.8 |
| Butte Regional Transit (B-Line) | F | Montana | 45.2 |
| Butte-Silver Bow | F | Montana | 48.7 |
| Butte-Silver Bow | F | Montana | 48.7 |
| BWI Thurgood Marshall Airport (BWI) Shuttle | F | Maryland | 46.2 |
| C TRAN | F | New York | 37.2 |
| Calabasas Transit System | F | — | 47.5 |
| Calabasas Transit System | F | California | 47.5 |
| Calaveras Transit | B | — | 80.7 |
| Calaveras Transit | B | California | 80.7 |
| CALO Ferry Service | B | North Carolina | 87.5 |
| Caltrain | A | California | 93.2 |
| Caltrain | A | California | 93.2 |
| Calvert County Public Transportation | F | Maryland | 30.9 |
| Camarillo Area Transit | D | — | 68.0 |
| Camarillo Area Transit | D | California | 68.0 |
| Campus Area Rapid Transit (CART) | D | Oklahoma | 66.9 |
| Canby Area Transit (CAT) | B | Oregon | 83.2 |
| Canby Ferry | C | Oregon | 79.3 |
| Cape Ann Transportation Authority (CATA) | B | Massachusetts | 80.4 |
| Cape Ann Transportation Authority (CATA) | B | Massachusetts | 80.4 |
| Cape Cod Regional Transportation Authority (Cape Cod RTA) | F | Massachusetts | 51.9 |
| Cape Cod Regional Transportation Authority (Cape Cod RTA) | F | Massachusetts | 51.9 |
| Capital Area Transit (GoRaleigh) | F | North Carolina | 51.8 |
| Capital Area Transit (GoRaleigh) | F | North Carolina | 42.8 |
| Capital Area Transit (GoRaleigh) | C | North Carolina | 72.3 |
| Capital Area Transit (GoRaleigh) | F | North Carolina | 51.8 |
| Capital Area Transit System (CATS) | F | Louisiana | 46.2 |
| Capital Area Transit System (CATS) | D | Louisiana | 64.7 |
| Capital Area Transportation Authority (CATA) | D | Michigan | 64.6 |
| Capital District Transportation Authority (CDTA) | A | New York | 91.0 |
| Capital Metro | C | Texas | 73.2 |
| Capital Trailways | F | Alabama | 46.7 |
| Capital Transit | B | Alaska | 81.3 |
| Capital Transit | B | Alaska | 81.3 |
| Capital Transit | F | Montana | 43.5 |
| Capitol Corridor Joint Powers Authority (Capitol Corridor) | D | — | 61.1 |
| Caravan Airport Transportation | B | Oregon | 84.0 |
| Carlsbad Municipal Transit System | F | New Mexico | 42.9 |
| Carlsbad Municipal Transit System | F | New Mexico | 55.4 |
| Carroll Transit System | F | Maryland | 42.3 |
| Carson Circuit | F | — | 42.7 |
| Carson Circuit | F | California | 42.7 |
| Cascade POINT | F | Oregon | 49.6 |
| Cascades East Transit (CET) | F | Oregon | 48.4 |
| Cascades East Transit (CET) | F | Oregon | 48.4 |
| Casco Bay Lines | F | Maine | 46.6 |
| Cat Tran Shuttle | F | Arizona | 36.8 |
| Cat Tran Shuttle | F | Arizona | 36.8 |
| Cat Tran Shuttle | F | Arizona | 34.9 |
| CATABUS | F | Pennsylvania | 22.0 |
| Catalina Flyer | F | — | 47.6 |
| Catalina Flyer | F | California | 47.6 |
| Catholic Community Services | F | Washington | 57.5 |
| Catholic Community Services | F | Washington | 57.5 |
| Catholic Community Services | F | Washington | 57.5 |
| Cecil Transit | F | Maryland | 26.8 |
| Cecil Transit | F | — | 40.0 |
| Cedar Rapids Transit | B | Iowa | 88.2 |
| Cedar Rapids Transit | B | Iowa | 88.2 |
| Central Community Transit | B | Minnesota | 83.6 |
| Central Florida Regional Transit Authority (LYNX) | F | Florida | 54.9 |
| Central Ohio Transit Authority (COTA) | D | Ohio | 66.0 |
| Central Oregon Breeze | C | Oregon | 77.0 |
| Centro | D | New York | 61.2 |
| Champaign Urbana Mass Transit District (MTD) | D | Illinois | 64.8 |
| Chapel Hill Transit (CHT) | F | North Carolina | 41.5 |
| Chapel Hill Transit (CHT) | F | North Carolina | 41.5 |
| Charles County VanGo | F | Maryland | 25.8 |
| Charleston Area Regional Transportation Authority (CARTA) | D | South Carolina | 60.2 |
| Charleston Area Regional Transportation Authority (CARTA) | D | South Carolina | 64.1 |
| Charlotte Area Transit System (CATS) | F | North Carolina | 44.1 |
| Charlotte Area Transit System (CATS) | D | North Carolina | 69.7 |
| Charm City Circulator | F | Maryland | 49.6 |
| Chatham Area Transit (CAT) | F | Georgia | 8.7 |
| Chatham Area Transit (CAT) | F | Georgia | 46.0 |
| Chattanooga Area Regional Transportation Authority (CARTA) | F | Tennessee | 33.8 |
| Chattanooga Area Regional Transportation Authority (CARTA) | F | Tennessee | 32.6 |
| Chautauqua Area Regional Transit System (CARTS) | F | New York | 54.2 |
| Chenango First Transit | D | New York | 61.2 |
| Cherokee Area Transportation System (CATS) | F | Georgia | 45.1 |
| Cherriots | F | Oregon | 23.8 |
| Chicago Transit Authority (CTA) | F | Illinois | 36.3 |
| Chicago Water Taxi | F | Illinois | 48.0 |
| Chittenden County Transportation Authority (CCTA) | B | Vermont | 81.1 |
| Chittenden County Transportation Authority (CCTA) | B | Vermont | 81.1 |
| Cincinnati Metro | C | Ohio | 76.5 |
| Cincinnati Metro | C | Ohio | 76.7 |
| Citibus | D | Texas | 66.6 |
| Citibus | F | Iowa | 48.4 |
| Citibus | D | Texas | 66.6 |
| Cities Area Transit | F | North Dakota | 44.3 |
| Cities Area Transit | C | North Dakota | 71.1 |
| Citilink | F | Indiana | 38.9 |
| Citilink | B | Indiana | 83.0 |
| Citrus County Transit | F | Florida | 48.4 |
| City 2 City Shuttle | F | Oregon | 51.1 |
| City Coach | F | — | 57.0 |
| City Coach | F | California | 53.5 |
| City of Alexandria | C | — | 75.5 |
| City of Banning Transit | C | — | 75.8 |
| City of Banning Transit | C | California | 75.8 |
| City of Bell (La Campana) | F | — | 44.7 |
| City of Bell (La Campana) | F | California | 50.3 |
| City of Bell (La Campana) | F | California | 44.7 |
| City of Corvallis | F | Oregon | 45.3 |
| City of Corvallis | F | Oregon | 45.3 |
| City of Corvallis | C | Oregon | 73.5 |
| City of Douglas | D | Arizona | 69.8 |
| City of Ellensburg Public Transit (Central Transit) | D | Washington | 69.7 |
| City of Ellensburg Public Transit (Central Transit) | A | Washington | 92.3 |
| City of Ellensburg Public Transit (Central Transit) | D | Washington | 69.7 |
| City of Fountain Transit | B | Colorado | 81.1 |
| City of Fountain Transit | B | Colorado | 81.1 |
| City of Glendale | F | California | 49.1 |
| City of Jackson (JTRAN) | D | Mississippi | 68.9 |
| City of Las Vegas | F | Nevada | 51.9 |
| City of Las Vegas | F | Nevada | 51.9 |
| City of Lompoc Transit (COLT) | F | California | 45.8 |
| City of Long Beach Transportation | D | New York | 64.2 |
| City of Madera | F | — | 58.6 |
| City of Madera | F | California | 58.6 |
| City of Mechanicville Public Transit | D | New York | 65.9 |
| City of Miami Beach | C | Florida | 72.0 |
| City of Miami Gardens | C | Florida | 77.2 |
| City of Milton-Freewater Public Transportation | F | Oregon | 52.8 |
| City of Milton-Freewater Public Transportation | D | Oregon | 69.3 |
| City of Milton-Freewater Public Transportation | F | Oregon | 52.8 |
| City of San Luis Obispo Transit | B | — | 86.4 |
| City of Show Low | F | Arizona | 57.2 |
| City of Sierra Vista | F | Arizona | 48.6 |
| City of Tracy (TRACER) | F | — | 14.6 |
| City of Tracy (TRACER) | D | California | 69.8 |
| City of Tracy (TRACER) | F | California | 14.6 |
| City of Winona MN - Winona Transit Service | D | Minnesota | 61.7 |
| CityBus of Greater Lafayette Indiana (CityBus) | C | Indiana | 76.6 |
| Clackamas Community College (CCC) Xpress | F | Oregon | 54.8 |
| ClackCo Connects (Clackamas County) | B | Oregon | 84.0 |
| ClackCo Connects (Clackamas County) | B | Oregon | 84.0 |
| Clallam Transit System | C | Washington | 78.2 |
| Clallam Transit System | C | Washington | 78.2 |
| Clark County Public Transportation Benefit Area | B | Washington | 84.1 |
| Clarkstown MiniTrans | D | New York | 63.1 |
| Clear Creek County Transit | C | Colorado | 75.9 |
| Clear Creek County Transit | C | Colorado | 75.9 |
| Clemson Area Transit (CAT) | F | South Carolina | 46.6 |
| Clemson Area Transit (CAT) | F | South Carolina | 46.6 |
| Clinton County Public Transit (CCPT) | F | New York | 35.3 |
| Clinton Municipal Transit Administration (Clinton MTA) | C | Iowa | 79.9 |
| Clinton Municipal Transit Administration (Clinton MTA) | C | Iowa | 79.9 |
| Clovis Transit | F | — | 59.8 |
| Clovis Transit | C | California | 71.0 |
| Clovis Transit | F | California | 59.8 |
| Coach Company | F | Massachusetts | 48.5 |
| Coach Company | F | Massachusetts | 48.5 |
| COAST Transportation | F | Washington | 38.5 |
| CobbLinc | D | Georgia | 61.2 |
| COG Trolley Routes | B | Alabama | 88.4 |
| Collier Area Transit (CAT) | F | Florida | 30.1 |
| Collier Area Transit (CAT) | F | Florida | 49.2 |
| Colorado Mountain Express | C | Colorado | 75.4 |
| Colorado Mountain Express | C | Colorado | 75.4 |
| Colorado School Of Mines | C | Colorado | 76.4 |
| Columbia Area Transit (CAT) | B | Oregon | 81.1 |
| Columbia County Public Transportation | C | Washington | 73.1 |
| Columbia County Public Transportation | C | New York | 77.7 |
| Columbia County Rider | C | — | 77.9 |
| Colville Confederated Tribes Transit | C | Washington | 79.4 |
| Commerce Municipal Bus Lines | B | — | 83.8 |
| Community in Motion | C | Washington | 74.5 |
| Community Transit (CT) | B | Washington | 81.4 |
| Commute.org San Mateo County Shuttles | B | California | 85.5 |
| Commute.org San Mateo County Shuttles | B | California | 85.5 |
| Commuter Bus | F | Maryland | 54.8 |
| Compton Renaissance | F | — | 32.4 |
| Concord Kannapolis Area Transit (Rider Transit) | F | North Carolina | 42.9 |
| Concord Kannapolis Area Transit (Rider Transit) | D | North Carolina | 65.4 |
| Concord Kannapolis Area Transit (Rider Transit) | F | North Carolina | 42.9 |
| Connect Transit | F | Texas | 35.0 |
| Connect Transit | F | Illinois | 37.4 |
| Connect Transit | D | Illinois | 64.4 |
| Connecticut Transit | F | Connecticut | 53.6 |
| Coos County Area Transit (CCAT) | C | Oregon | 72.3 |
| Copper Mountain Transit | F | Arizona | 56.9 |
| Coralville Transit | B | Iowa | 82.8 |
| Coralville Transit | B | Iowa | 81.1 |
| Corning Erwin Area Transit System (CEATS) | F | New York | 40.9 |
| Corona Cruiser | B | — | 84.0 |
| Corona Cruiser | B | California | 84.0 |
| Corpus Christi Regional Transportation Authority | F | Texas | 40.0 |
| CorridorRides | B | Iowa | 86.7 |
| CorridorRides | B | Iowa | 86.7 |
| Cortland County Public Transportation | F | New York | 32.8 |
| Cotton Express and Central Arizona Regional Transit | D | Arizona | 64.8 |
| Cottonwood Area Transit (CAT) | C | Arizona | 79.4 |
| Cottonwood Area Transit (CAT) | C | Arizona | 79.4 |
| County Connection (CCCTA) | F | California | 51.9 |
| County Connection (CCCTA) | D | Tennessee | 62.5 |
| Cripple Creek Transportation | C | Colorado | 78.4 |
| Cripple Creek Transportation | C | Colorado | 78.4 |
| Cudahy Area Rapid Transit | F | — | 41.7 |
| Cudahy Area Rapid Transit | F | California | 47.1 |
| Cudahy Area Rapid Transit | F | California | 41.7 |
| CUE Bus | F | — | 47.9 |
| Culver City Bus | F | — | 56.6 |
| Curry Public Transit | B | Oregon | 84.9 |
| Cuttyhunk Ferry Company | B | Massachusetts | 83.1 |
| Cuttyhunk Ferry Company | B | Massachusetts | 83.1 |
| Cuyahoga Valley Scenic Railroad | D | Ohio | 60.7 |
| CyRide | B | Iowa | 80.2 |
| Dallas Area Rapid Transit (DART) | F | Texas | 21.5 |
| Dallas Host Committee | F | Texas | 53.8 |
| Dana Point Trolley | D | California | 62.2 |
| Dartmouth College | C | New Hampshire | 75.6 |
| DATTCO Motorcoach | F | Massachusetts | 50.9 |
| DATTCO Motorcoach | F | Massachusetts | 50.9 |
| DC Streetcar | F | District of Columbia | 45.9 |
| DC Streetcar | F | District of Columbia | 57.2 |
| DC Streetcar | F | District of Columbia | 45.9 |
| DeKalb Public Transit | C | Illinois | 74.3 |
| DeKalb Public Transit | C | Illinois | 74.3 |
| Delano Area Rapid Transit | B | — | 87.5 |
| Delaware Transit Corporation (DART First State) | F | Delaware | 48.0 |
| Delmarva Community Transit | F | Maryland | 31.4 |
| Des Moines Area Regional Transit Authority (DART) | F | Iowa | 57.3 |
| Detroit Department of Transportation (DDOT) | F | Michigan | 36.0 |
| Detroit People Mover | B | Michigan | 82.6 |
| Diamond Express | B | Oregon | 84.6 |
| do not use - deprecfated | C | Washington | 74.6 |
| Dodger Area Rapid Transit | C | Iowa | 71.6 |
| Dodger Area Rapid Transit | C | Iowa | 71.6 |
| Dolores County | D | Colorado | 60.1 |
| DowneyLINK | F | California | 46.9 |
| Downtown Alliance | A | New York | 92.2 |
| Downtown Alliance | A | New York | 92.2 |
| DRTO Ferry Service | A | Florida | 99.8 |
| Duarte Transit | F | — | 46.8 |
| Duarte Transit | F | California | 46.8 |
| Duke University | F | North Carolina | 38.6 |
| Duke University | F | North Carolina | 38.6 |
| Duluth Transit | F | Minnesota | 58.9 |
| Durango Transit | B | Colorado | 86.6 |
| Dutchess County | D | New York | 63.3 |
| Eastern Point | F | Oregon | 51.1 |
| Eastern Sierra Transit | B | — | 85.6 |
| Eastern Sierra Transit | B | California | 85.6 |
| Eastside Friends of Seniors | C | Washington | 73.8 |
| Easy Ride Transportation | D | Colorado | 64.8 |
| ECO Transit | F | Colorado | 45.6 |
| ECO Transit | F | Colorado | 45.6 |
| El Dorado County Transit Authority | B | — | 84.1 |
| El Dorado Transit | B | Colorado | 84.1 |
| El Monte Transit | F | — | 51.7 |
| El Monte Transit | F | California | 51.7 |
| El Paso Transportation Authority | C | Texas | 77.7 |
| El Segundo Transportation | F | — | 43.8 |
| El Segundo Transportation | F | California | 46.8 |
| El Segundo Transportation | F | California | 43.8 |
| Elevated Transit | F | Utah | 47.5 |
| Elk Grove Transit | F | California | 39.2 |
| Elwha Transit | C | Washington | 75.5 |
| Embark | F | Oklahoma | 43.7 |
| Embark | B | Oklahoma | 81.6 |
| Emerald Bay Shuttle | D | California | 65.1 |
| Emerald Coast Rider (ECR) | F | Florida | 51.9 |
| Emerald Coast Rider (ECR) | F | Florida | 51.9 |
| Emery Go-Round | F | — | 54.6 |
| Emery Go-Round | C | California | 77.9 |
| Emery Go-Round | F | California | 54.6 |
| Emory University Cliff Shuttles | F | Georgia | 39.8 |
| Envida | B | Colorado | 84.0 |
| Envida | B | Colorado | 84.0 |
| Erie Metropolitan Transit Authority | F | Pennsylvania | 45.7 |
| Erie Metropolitan Transit Authority | F | Pennsylvania | 45.7 |
| Escambia County Area Transit (ECAT) | F | Florida | 46.7 |
| Escambia County Area Transit (ECAT) | F | Florida | 46.7 |
| Estes Transit | C | Colorado | 72.8 |
| eTrans | A | — | 96.7 |
| eTrans | A | California | 96.7 |
| Eugene to BEND | F | Oregon | 54.0 |
| Eugene to Coos Bay | F | Oregon | 54.8 |
| Everett Transit | C | Washington | 71.7 |
| Everett Transit | C | Washington | 77.5 |
| Express Arrow | F | — | 49.9 |
| Express Arrow | F | — | 49.9 |
| EZ Rider | F | Texas | 46.3 |
| Fairfax Connector | D | Virginia | 61.3 |
| Fairfax CUE Bus (CUE) | D | Virginia | 68.3 |
| Fairfax CUE Bus (CUE) | D | Virginia | 63.1 |
| Fairfax CUE Bus (CUE) | D | Virginia | 68.3 |
| Fairfield and Suisun Transit (FAST Transit) | F | California | 48.4 |
| Fairfield and Suisun Transit (FAST) | F | — | 50.1 |
| Farmville Area Bus | D | Virginia | 64.6 |
| Farmville Area Bus | D | Virginia | 64.6 |
| Fixed Route | D | Kentucky | 63.2 |
| fixed route | C | North Carolina | 72.6 |
| fixed route | F | North Carolina | 44.1 |
| Fixed route + flex | D | Minnesota | 64.8 |
| Flex | D | Colorado | 64.8 |
| Flex | C | Virginia | 73.0 |
| Flex | C | Virginia | 78.6 |
| Flex | C | Colorado | 79.1 |
| Flex | F | Massachusetts | 41.3 |
| Flex | D | Colorado | 64.8 |
| Flex | C | Oregon | 76.1 |
| Flex | F | New Hampshire | 41.1 |
| Flex | F | Colorado | 22.5 |
| Flex | C | Virginia | 78.4 |
| Flex | B | Virginia | 85.0 |
| Flex | B | Colorado | 80.2 |
| Flex | C | Virginia | 75.7 |
| Flex | D | Colorado | 64.8 |
| Flex | C | Colorado | 72.9 |
| Flex | D | Colorado | 64.8 |
| Flex | C | Colorado | 78.4 |
| Flex | D | Colorado | 64.8 |
| Flex | C | Virginia | 77.7 |
| Flex | D | Vermont | 60.3 |
| Flex | B | Virginia | 80.2 |
| Flex | D | Colorado | 60.1 |
| Flex | D | Colorado | 60.1 |
| Flex | F | Virginia | 48.5 |
| Flex | D | Colorado | 64.8 |
| Flex | D | Colorado | 60.1 |
| Flex | C | Colorado | 72.9 |
| Flex | F | Virginia | 46.4 |
| Flex | D | Colorado | 62.8 |
| Flex | C | Virginia | 76.9 |
| Flex | F | Virginia | 57.9 |
| Flex | F | California | 37.8 |
| Flex | C | Colorado | 76.7 |
| Flex | D | Colorado | 62.1 |
| Flex | F | Colorado | 54.8 |
| Flex | C | Colorado | 77.7 |
| Flex | C | Colorado | 72.0 |
| Flex | C | Colorado | 75.5 |
| Flex | D | Virginia | 66.0 |
| Flex | B | Colorado | 80.2 |
| Flex | F | Colorado | 57.5 |
| Flex | C | Virginia | 76.2 |
| Flex | C | Virginia | 78.5 |
| Flex v2 included | D | Colorado | 60.2 |
| Flex v2 included | C | Colorado | 76.8 |
| Flex v2 included | B | Colorado | 81.9 |
| Flex v2 included | D | Minnesota | 63.0 |
| Flex v2 included | C | Colorado | 77.5 |
| Flex v2 included | C | Colorado | 75.5 |
| Flex v2 included | C | Colorado | 73.8 |
| Flex v2 included | C | Colorado | 73.0 |
| Flex v2 included | C | Colorado | 76.3 |
| Flex v2 included | C | Colorado | 70.2 |
| Flex v2 included | C | Colorado | 75.5 |
| Flex v2 included | C | Colorado | 75.5 |
| Flex v2 included | F | Colorado | 44.4 |
| Flex v2 included | B | Colorado | 84.0 |
| Flex v2 included | D | Minnesota | 62.1 |
| Flex v2 included | B | Colorado | 81.6 |
| Flex v2 included | F | Colorado | 55.5 |
| Flixbus | F | — | 52.3 |
| Florida Department of Transportation (SunRail) | A | Florida | 91.9 |
| Foothill Transit | F | California | 50.9 |
| Fort Worth Transit Authority | C | Texas | 75.1 |
| Four County Transit | B | Virginia | 80.9 |
| Franklin County Public Transportation | F | New York | 57.1 |
| Franklin Regional Transit Authority (FRTA) | C | Massachusetts | 78.1 |
| Franklin Transit Authority | C | Tennessee | 72.1 |
| Franklin Transit Authority | C | Tennessee | 72.1 |
| Frederick County TransIT | F | Maryland | 34.3 |
| Frederick County TransIT | F | Maryland | 50.7 |
| Fredericksburg Regional Transit | F | Virginia | 25.8 |
| Fredericksburg Regional Transit | F | Virginia | 38.6 |
| Freedom Cruise Line | F | Massachusetts | 53.7 |
| Freedom Cruise Line | F | Massachusetts | 53.7 |
| Fresno Area Express (FAX) | F | California | 51.0 |
| Fresno County Rural Transit Agency (FCRTA) | A | — | 90.3 |
| Froggy Transportation | B | Ohio | 82.4 |
| Gainesville Regional Transit System | F | Florida | 40.9 |
| Gainesville Regional Transit System | F | Florida | 47.6 |
| Gallup Express | F | New Mexico | 59.1 |
| Gallup Express | F | New Mexico | 59.1 |
| Galveston Island Transit | C | — | 71.7 |
| Garden of the Gods | F | Colorado | 45.5 |
| Garden of the Gods | F | Colorado | 45.5 |
| Georgia Tech Trolley & Stinger Shuttles | F | Georgia | 37.4 |
| Get Around Town Express | F | California | 46.7 |
| Glendale Beeline | F | California | 49.1 |
| Glendora Transportation Division | F | California | 35.7 |
| Glendora Transportation Division | D | — | 64.7 |
| Glenn Transit Service | F | — | 33.5 |
| Glenn Transit Service | F | California | 49.7 |
| Glenn Transit Service | B | California | 85.2 |
| Glenn Transit Service | F | California | 33.5 |
| Gloversville Transit Services | F | New York | 30.2 |
| Gloversville Transit System | F | New York | 32.2 |
| GO Transit | B | Wisconsin | 87.5 |
| GO Transit | B | Wisconsin | 87.5 |
| Go West Shuttle | F | — | 48.5 |
| Go West Shuttle | F | California | 48.5 |
| GoCary | F | North Carolina | 52.8 |
| GoCary | B | North Carolina | 81.1 |
| GoCary | F | North Carolina | 52.8 |
| GoDurham | F | North Carolina | 38.0 |
| GoDurham | F | North Carolina | 38.0 |
| Gold Coast Transit, South Coast Area Transit | F | California | 35.5 |
| Golden Empire Transit District (GET) | B | — | 89.1 |
| Golden Gate Transit | D | California | 69.1 |
| GoTriangle | F | North Carolina | 50.2 |
| GoTriangle | F | — | 54.6 |
| GoTriangle | F | North Carolina | 50.2 |
| GoWal | F | Florida | 47.6 |
| Graham Transit | B | Virginia | 80.2 |
| Graham Transit | B | Virginia | 80.2 |
| Grand Valley Transit | F | Colorado | 55.2 |
| Grant Transit Authority | C | Washington | 79.1 |
| GrapeLine | C | — | 75.5 |
| Grays Harbor Transit | A | Washington | 95.0 |
| Grays Harbor Transit | A | Washington | 95.0 |
| Greater Attleboro Taunton Regional Transit Authority (GATRA) | F | Massachusetts | 35.7 |
| Greater Attleboro Taunton Regional Transit Authority (GATRA) | F | Massachusetts | 35.7 |
| Greater Bridgeport Transit | C | Connecticut | 75.2 |
| Greater Bridgeport Transit | C | Connecticut | 75.2 |
| Greater Cleveland Regional Transit Authority | F | Ohio | 20.9 |
| Greater Dayton Regional Transit Authority (Greater Dayton RTA) | C | Ohio | 76.4 |
| Greater Glens Falls Transit | F | New York | 20.2 |
| Greater Lynchburg Transit Co. | B | Virginia | 81.4 |
| Greater Lynchburg Transit Co. | B | Virginia | 81.4 |
| Greater Peoria Mass Transit (CityLink) | F | Illinois | 36.7 |
| Greater Peoria Mass Transit (CityLink) | D | Illinois | 65.2 |
| Greater Peoria Mass Transit (CityLink) | F | Illinois | 36.7 |
| Greater Portland Metro Bus | F | Maine | 23.5 |
| Greater Portland Metro Bus | F | Maine | 51.4 |
| Greeley-Evans Transit (GET) | B | Colorado | 80.4 |
| Green Bay Metro | F | Wisconsin | 26.9 |
| Green Mountain Community Network (GMCN) | C | Vermont | 78.0 |
| Green Mountain Community Network (GMCN) | C | Vermont | 78.0 |
| Greene County Transit | F | New York | 54.8 |
| Greensboro Transit Authority (GTA) | F | North Carolina | 47.6 |
| Greensville Emporia Transit | D | Virginia | 66.9 |
| Greensville Emporia Transit | D | Virginia | 66.9 |
| Groome Transportation | F | — | 37.6 |
| Groome Transportation | F | — | 37.6 |
| Groome Transportation (Greenride) | F | Colorado | 45.0 |
| Groome Transportation - Arizona Shuttle | F | Arizona | 44.1 |
| Groome Transportation - Arizona Shuttle | F | Arizona | 44.1 |
| Groome Transportation - Colorado Springs Shuttle | F | Colorado | 49.4 |
| Groome Transportation - Colorado Springs Shuttle | F | Colorado | 49.4 |
| GRTC Transit System | F | Virginia | 31.7 |
| GTrans | F | — | 23.0 |
| GTrans | D | California | 66.5 |
| GTrans | F | California | 23.0 |
| Guadalupe Flyer | F | — | 47.5 |
| Guadalupe Flyer | F | California | 47.5 |
| Guemes Island Ferry | C | Washington | 74.7 |
| Gunnison Valley Transportation Authority (RTA) | A | Colorado | 98.2 |
| Gunnison Valley Transportation Authority (RTA) | A | Colorado | 98.2 |
| Gwinnett County Transit | F | Georgia | 42.4 |
| Gwinnett County Transit | C | Georgia | 71.7 |
| Gwinnett County Transit | F | Georgia | 42.4 |
| Hampton Roads Transit (HRT) | D | Virginia | 62.3 |
| Harbor Connector | B | Maryland | 81.4 |
| Harbor Connector | B | Maryland | 81.4 |
| Harford Transit LINK | F | Maryland | 32.0 |
| Harney County | C | Oregon | 79.1 |
| Hartford Line - Rail | B | Connecticut | 83.8 |
| Hartford Line - Rail | F | Connecticut | 58.3 |
| Hawai'i Mass Transit Agency (Hele-On Bus) | F | Hawaii | 51.9 |
| HDPT | F | Virginia | 30.4 |
| Herkimer-Oneida Counties Transportation Study (HOCTS) | F | New York | 24.9 |
| Hernando County Transit (TheBus) | F | Florida | 50.2 |
| Hernando County Transit (TheBus) | F | Florida | 50.2 |
| Hiawathaland Transit | C | — | 76.2 |
| Hillsborough Area Regional Transit (HART) | F | Florida | 56.0 |
| Homage: DʼArling Direct | F | Washington | 48.8 |
| Home James | B | Colorado | 83.2 |
| Home James | B | Colorado | 83.2 |
| Hope College Evening Shuttle | B | — | 81.1 |
| Hopelink Transportation | D | Washington | 60.1 |
| Hornell Area Transit | F | New York | 39.0 |
| Hudson Link | B | New York | 82.7 |
| Humboldt Transit Authority | C | — | 78.2 |
| Humboldt Transit Authority | B | California | 82.1 |
| Humboldt Transit Authority | A | California | 90.7 |
| Huntington Area Rapid Transit (HART) | C | New York | 73.8 |
| Huntington Park Express | F | California | 44.9 |
| Huntington Park Express | F | — | 48.8 |
| Huntsville Shuttle | F | Alabama | 46.7 |
| Huntsville Shuttle | C | Alabama | 72.3 |
| Hy-Line Cruises | B | Massachusetts | 81.2 |
| Hy-Line Cruises | B | Massachusetts | 81.2 |
| I-RIDE Trolley (I-RIDE) | D | Florida | 69.5 |
| Indian Trails, Detroit Ann Arbor Express | F | Michigan | 56.1 |
| Indian Trails, Detroit Ann Arbor Express | F | Michigan | 56.1 |
| IndyGo | F | Indiana | 37.4 |
| Inter-Island Ferry | B | Alaska | 82.8 |
| Inter-Island Ferry | B | Alaska | 82.8 |
| Intercity Transit | C | Washington | 79.3 |
| Intercity Transit | C | Washington | 75.5 |
| Interurban Trolley | B | Indiana | 85.2 |
| Iowa City Transit System | C | Iowa | 75.3 |
| Iowa City Transit System | C | Iowa | 75.3 |
| Island Transit | C | Washington | 74.7 |
| Jackson Transit Authority | F | Tennessee | 59.5 |
| Jamestown S'klallam | F | Washington | 55.5 |
| Jamestown S'klallam | F | Washington | 55.5 |
| Janesville Transit System | B | Wisconsin | 82.2 |
| Janesville Transit System | F | Wisconsin | 52.5 |
| Janesville Transit System | B | Wisconsin | 82.2 |
| JeffCo Express | F | Missouri | 43.7 |
| JeffCo Express | F | Missouri | 43.7 |
| Jefferson Transit Authority | A | Washington | 98.0 |
| Jefferson Transit Authority | A | Washington | 98.0 |
| JFK Airtrain | F | New York | 41.8 |
| Johnson County Transit | D | Kansas | 66.4 |
| Jonesboro Economical Transportation (JET) | F | Arkansas | 44.1 |
| Josephine County Transit (JCT) | B | Oregon | 84.9 |
| JTRAN | F | Mississippi | 45.4 |
| JTRAN | F | Mississippi | 45.4 |
| Jump Around Carson | F | Nevada | 50.8 |
| Kalamazoo Metro Transit | F | Michigan | 31.8 |
| Kalamazoo Metro Transit | F | Michigan | 31.4 |
| Kalispel Tribal Transit (KalTran) | F | Washington | 56.4 |
| Kansas City Area Transportation Authority (KCATA) | F | Missouri | 27.0 |
| Kayak Transit (CTUIR) | F | Oregon | 46.7 |
| Kayak Transit (CTUIR) | F | Oregon | 46.7 |
| Kern Transit | B | — | 83.1 |
| Kern Transit | B | California | 83.1 |
| Key West Transit | F | Florida | 44.7 |
| Key West Transit | F | Florida | 44.7 |
| Kimball County Transit Service | F | Nebraska | 51.9 |
| King County Metro | C | Washington | 79.3 |
| Kingman Area Regional Transit | F | Arizona | 57.2 |
| Kings Area Rural Transit | F | — | 42.4 |
| Kings Area Rural Transit | C | California | 73.5 |
| Kings Area Rural Transit | F | California | 42.4 |
| Kiryas Joel Area Transit | F | New York | 50.7 |
| Kitsap Transit | C | Washington | 71.5 |
| Klamath Shuttle | F | Oregon | 51.1 |
| Klamath Shuttle - Crater Lake Trolley | F | Oregon | 50.9 |
| Knoxville Area Transit (KAT) | F | Tennessee | 56.8 |
| KU on Wheels & Lawrence Transit System | F | Kansas | 35.1 |
| KU on Wheels & Lawrence Transit System | D | Kansas | 65.6 |
| L.E.W.I.S. Mountain Highway Transit | F | Washington | 54.4 |
| L.E.W.I.S. Mountain Highway Transit | F | Washington | 54.4 |
| La Puente LINK | F | — | 43.8 |
| La Puente LINK | F | California | 44.2 |
| La Puente LINK | F | California | 43.8 |
| LADOT (DASH and Commuter Express) | F | — | 50.2 |
| Lady of the Lake | D | Washington | 67.9 |
| Laguna Beach Transit (LBT) | B | — | 81.9 |
| Laguna Beach Transit (LBT) | B | California | 81.9 |
| Lake Champlain Ferries | C | Vermont | 76.7 |
| Lake Champlain Ferries | C | Vermont | 76.7 |
| Lake County Connection | F | Florida | 49.6 |
| Lake County Connection | C | Florida | 77.4 |
| Lake Transit Authority (LTA) | C | — | 79.8 |
| Lake Transit Authority (LTA) | C | California | 79.8 |
| Lakeland Area Mass Transit | F | Florida | 24.0 |
| Laketran | C | Ohio | 77.0 |
| Laketran | C | Ohio | 77.0 |
| Lane Transit District (LTD) | F | Oregon | 39.2 |
| Lassen Rural Bus (LRB) | B | — | 80.5 |
| Lassen Rural Bus (LRB) | B | California | 80.5 |
| Lawndale Beat | B | — | 82.8 |
| Lawndale Beat | B | California | 82.8 |
| LeeTran | D | Florida | 66.7 |
| Lehigh and Northampton Transportation Authority (LANTA) | F | Pennsylvania | 14.1 |
| Leprechaun Lines | C | New York | 70.2 |
| Let'er Bus | C | Oregon | 75.6 |
| Lewis County Public Transportation | F | New York | 49.9 |
| Lewiston Transit System and Asotin County Public Transportation Benefit Area (PTBA) | C | Washington | 78.7 |
| Lextran | F | Kentucky | 36.5 |
| Lextran | D | Kentucky | 67.3 |
| Light Rail | C | Maryland | 74.9 |
| LimoLiner | F | Massachusetts | 51.1 |
| LimoLiner | F | Massachusetts | 51.1 |
| Lincoln County Transit (LCT) | B | Oregon | 84.8 |
| Link Lane | B | Oregon | 84.9 |
| Link Transit | C | Washington | 76.0 |
| Link Transit | C | North Carolina | 75.6 |
| Linn Shuttle | C | Oregon | 79.3 |
| LINX Transit, Linn-Benton Loop, Albany Transit System | C | Oregon | 76.7 |
| Livermore Amador Valley Transit Authority | F | California | 58.3 |
| Livingston County | C | New York | 76.3 |
| Local Bus | D | Maryland | 67.1 |
| Logan Express | F | Massachusetts | 48.4 |
| Logan Express | F | Massachusetts | 48.4 |
| London Transit Commission (Ontario) | C | CA | 74.2 |
| Long Beach Transit (LBT) | F | California | 37.9 |
| Long Island Rail Road | C | — | 79.5 |
| Long Island Rail Road | D | New York | 66.4 |
| Loop Trolley | C | Missouri | 77.1 |
| Los Angeles County Department of Public Works (the LINK and shuttles) | B | — | 85.7 |
| Los Angeles County Department of Public Works (the LINK and shuttles) | B | California | 85.7 |
| Loudoun County Transit | C | Virginia | 74.8 |
| Lowell Regional Transit Authority (LRTA) | D | Massachusetts | 60.9 |
| Lowell Regional Transit Authority (LRTA) | D | Massachusetts | 60.9 |
| Lower Columbia CAP (Community Action Program) | F | Washington | 48.1 |
| Lower Columbia CAP (Community Action Program) | F | Washington | 48.1 |
| Lower Hudson Valley Transit | D | Connecticut | 69.8 |
| Lummi Island Ferry | D | Washington | 66.0 |
| Lummi Transit | F | Washington | 42.6 |
| Lynwood Trolley / Breeze | F | California | 46.8 |
| Madera County Transit | C | — | 73.8 |
| Madera County Transit | C | California | 73.8 |
| Madison County Transit | D | New York | 63.1 |
| Madison County Transit | F | Missouri | 7.0 |
| Makah Public Transit | F | Washington | 53.7 |
| Makah Public Transit | B | Washington | 80.2 |
| Makah Public Transit | F | Washington | 53.7 |
| Malheur Council on Aging & Community Services | C | Oregon | 73.0 |
| Manatee County Area Transit | F | Florida | 39.0 |
| Manatee County Area Transit | C | Florida | 74.3 |
| Manhattan Bus | D | New York | 69.6 |
| Manteca Transit | C | — | 79.6 |
| Marble Valley Regional Transit District (MVRTD) | C | Vermont | 71.7 |
| Marble Valley Regional Transit District (MVRTD) | C | Vermont | 71.7 |
| MARC Train | D | Maryland | 60.7 |
| Marin Transit | D | — | 68.1 |
| Marin Transit | F | California | 54.5 |
| Marshalltown Municipal Transit | D | Iowa | 67.9 |
| Marshalltown Municipal Transit | D | Iowa | 67.9 |
| Martha's Vineyard Transit Authority | B | Massachusetts | 83.9 |
| Martha's Vineyard Transit Authority | B | Massachusetts | 83.9 |
| Mason City Public Transit | C | Iowa | 71.3 |
| Mason City Public Transit | C | Iowa | 71.3 |
| Mason Transit Authority | D | Washington | 66.2 |
| Mass Transportation Authority Flint | F | Michigan | 45.6 |
| Mass Transportation Authority Flint | C | Michigan | 75.2 |
| Massachusetts Bay Transportation Authority (MBTA) | C | Massachusetts | 75.4 |
| Massachusetts Ferry Service | F | Massachusetts | 40.6 |
| Massport | B | Massachusetts | 88.7 |
| MATBUS | F | North Dakota | 41.2 |
| Megabus | D | — | 68.9 |
| Memphis Area Transit Authority | F | Tennessee | 27.4 |
| Memphis Area Transit Authority | F | Tennessee | 40.3 |
| Mendocino Transit Authority | C | — | 78.4 |
| Mendocino Transit Authority | C | California | 78.4 |
| Merced County Transit (The Bus) | F | — | 54.9 |
| Merced County Transit (The Bus) | D | California | 65.5 |
| Merced County Transit (The Bus) | F | California | 54.9 |
| Merrimack Valley Regional Transit Authority (MVRTA) | F | Massachusetts | 48.9 |
| Merrimack Valley Regional Transit Authority (MVRTA) | F | Massachusetts | 45.4 |
| METRO Houston | F | Texas | 41.0 |
| Metro Ride | C | Wisconsin | 77.8 |
| Metro Ride | C | Wisconsin | 77.8 |
| Metro Rock Island County Metropolitan Mass Transit District | F | Illinois | 47.0 |
| Metro St. Louis | C | Missouri | 72.8 |
| Metro SubwayLink | C | Maryland | 75.3 |
| Metro Transit | B | Minnesota | 80.1 |
| Metro Transit - City of Madison | B | Wisconsin | 84.5 |
| Metro-North Railroad | C | New York | 71.5 |
| Metro-North Railroad | C | New York | 77.2 |
| Metrolink | D | — | 67.1 |
| Metropolitan Area Commuter System | F | Alaska | 36.3 |
| Metropolitan Atlanta Rapid Transit Authority (MARTA) | F | Georgia | 59.2 |
| Metropolitan Transit Authority of Black Hawk County | D | Iowa | 60.3 |
| Metropolitan Transit Authority of Black Hawk County | B | Iowa | 81.5 |
| Metropolitan Tulsa Transit Authority (MTTA) | F | Oklahoma | 28.3 |
| MetroWest Regional Transit Authority (MWRTA) | C | Massachusetts | 71.5 |
| Michigan Flyer | F | Michigan | 57.3 |
| Michigan Flyer | F | Michigan | 57.3 |
| Microsoft Shuttles | F | Washington | 18.9 |
| Middlesex 3 TMA | D | Massachusetts | 66.0 |
| Middlesex 3 TMA | D | Massachusetts | 66.0 |
| Middletown Area Transit | F | Connecticut | 44.9 |
| Middletown Area Transit | F | New York | 51.7 |
| Middletown Area Transit | F | Connecticut | 44.9 |
| Middletown Area Transit (MAT) | C | Connecticut | 77.7 |
| Middletown Area Transit (MAT) | C | Connecticut | 77.7 |
| Milwaukee County Transit System (MCTS) | F | Wisconsin | 39.6 |
| Milwaukee County Transit System (MCTS) | D | Wisconsin | 64.8 |
| Minnesota Valley Transit Authority (MVTA) | F | Minnesota | 47.7 |
| Mission Bay Transportation Management Association (TMA) | B | California | 83.8 |
| Mission Bay Transportation Management Association (TMA) | B | California | 83.8 |
| Modesto Area Express | F | — | 31.6 |
| Monroe County Transportation Authority (MCTA) | F | Pennsylvania | 52.4 |
| Montachusett Regional Transit Authority (MART) | C | Massachusetts | 78.0 |
| Montachusett Regional Transit Authority (MART) | C | Massachusetts | 78.0 |
| Montebello Bus Lines | F | — | 46.4 |
| Montebello Bus Lines | C | California | 73.9 |
| Montebello Bus Lines | F | California | 46.4 |
| Monterey-Salinas Transit (MST) | D | California | 66.7 |
| Montgomery County Department of Transportation (Ride On) | F | Maryland | 51.3 |
| Montgomery Transit | C | Alabama | 78.5 |
| Montgomery Transit | C | Alabama | 78.5 |
| Moorpark City Transit | C | — | 77.7 |
| Moorpark City Transit | C | California | 77.7 |
| MOOver | F | Vermont | 39.5 |
| MOOver | F | Vermont | 39.5 |
| Morongo Basin Transit Authority | C | — | 77.5 |
| Morongo Basin Transit Authority | C | California | 77.5 |
| Morro Bay Transit | F | California | 49.3 |
| Morro Bay Transit | F | California | 48.0 |
| Morro Bay Transit | F | California | 49.3 |
| Morrow County Public Transit | C | Oregon | 71.5 |
| Mount Adams Transportation Service | B | Washington | 82.5 |
| Mount Adams Transportation Service | B | Washington | 82.5 |
| Mountain Express (MtnExp) | F | Colorado | 55.8 |
| Mountain Express (MtnExp) | F | Colorado | 55.8 |
| Mountain Line | C | Montana | 73.5 |
| Mountain Line | F | Arizona | 28.3 |
| Mountain Line Transit | C | Arizona | 76.6 |
| Mountain Line Transit Authority | B | West Virginia | 85.6 |
| Mountain Lynx Transit | D | Virginia | 62.4 |
| Mountain Lynx Transit | D | Virginia | 62.4 |
| Mountain Metropolitan Transit | F | Colorado | 44.3 |
| Mountain Rides Transportation Authority (MRTA) | F | Idaho | 41.5 |
| Mountain Rides Transportation Authority (MRTA) | F | Idaho | 41.5 |
| Mountain Transit | B | — | 80.6 |
| Mountain Transit | B | California | 80.6 |
| Mountain View Community Shuttle | B | — | 84.5 |
| Mountain View Transportation Management Association (MVgo) | F | California | 47.9 |
| Mountain View Transportation Management Association (MVgo) | B | California | 89.7 |
| Mountain View Transportation Management Association (MVgo) | B | California | 87.1 |
| Mountain View Transportation Management Association (MVgo) | F | California | 47.9 |
| Move Stanislaus | C | — | 75.7 |
| Mt. Bachelor | F | Oregon | 50.2 |
| Muckleshoot Tribal Transit | C | Washington | 78.8 |
| Muletown Trolley | F | Tennessee | 55.5 |
| Muncie Indiana Transit System (MITS) | F | Indiana | 29.5 |
| MuscaBus | C | Iowa | 71.7 |
| MuscaBus | C | Iowa | 71.7 |
| Nantucket Regional Transit Authority (WAVE) | C | Massachusetts | 76.8 |
| Nantucket Regional Transit Authority (WAVE) | C | Massachusetts | 76.8 |
| Nashville MTA WeGo Public Transit | D | Tennessee | 67.8 |
| Nassau Inter-County Express (NICE Bus) | F | New York | 46.1 |
| Navajo Transit System | F | New Mexico | 56.6 |
| Navajo Transit System | F | New Mexico | 56.6 |
| Navajo Transit System | A | New Mexico | 90.3 |
| Needles Area Transit | B | — | 80.2 |
| Needles Area Transit | B | California | 80.2 |
| Nevada County Connects (Gold Country Stage) | D | — | 61.4 |
| Nevada County Connects (Gold Country Stage) | D | California | 61.4 |
| New York Trailways | F | New York | 14.6 |
| Newburgh Beacon Shuttle (Leprechaun Lines) | F | New York | 40.1 |
| Niagara Frontier Transportation Authority (NFTA) | F | New York | 29.7 |
| Nisqually Transit | F | Washington | 45.2 |
| North Carolina State University (NCSU) | F | North Carolina | 46.8 |
| North Carolina State University (NCSU) | F | North Carolina | 46.8 |
| North Carolina State University (NCSU) | D | North Carolina | 64.6 |
| North Central Regional Transit District (NCRTD) | F | New Mexico | 41.3 |
| North Country Express Transit | D | New York | 61.6 |
| North County Transit District (NCTD) | F | California | 23.9 |
| North County Transit District (NCTD) | F | California | 23.9 |
| NorthWest POINT | F | Oregon | 45.9 |
| Norwalk Transit District | F | Connecticut | 20.8 |
| Norwalk Transit System (NTS) | F | — | 22.7 |
| Norwalk Transit System (NTS) | F | California | 22.7 |
| Norwalk Transit System (NTS) | C | California | 73.1 |
| NY Waterway | F | New York | 33.0 |
| NY Waterway | C | New York | 76.4 |
| NYC Bus Company | D | New York | 62.5 |
| NYC Ferry | C | New York | 77.0 |
| NYC Subway | D | New York | 65.5 |
| NYC Subway Supplemented | C | New York | 73.7 |
| Ocean City Transportation | F | Maryland | 34.7 |
| Olean Area Transit System | D | New York | 62.3 |
| Omaha Metro | F | Nebraska | 39.3 |
| Omaha Metro | C | Nebraska | 76.3 |
| OmniTrans | C | California | 75.4 |
| Orange County Transportation Authority (OCTA) | F | California | 46.7 |
| Oregon Department of Transportation | B | Oregon | 83.1 |
| Oregon Department of Transportation | B | Oregon | 83.1 |
| Oregon Express Shuttle | C | Oregon | 77.6 |
| Otsego Express Public Transportation | F | New York | 40.6 |
| Pace Bus | F | Illinois | 46.9 |
| Pace Bus | C | Illinois | 70.8 |
| Pacific Crest Bus Lines | B | Oregon | 82.5 |
| Pacific Transit | B | Washington | 83.7 |
| Pacific Transit | B | Washington | 83.7 |
| Pacific Transit | B | Washington | 83.7 |
| Pahto Public Passage | C | Washington | 79.3 |
| Palm Tran | D | Florida | 69.4 |
| Palo Verde Valley Transit Agency | F | California | 50.7 |
| Palo Verde Valley Transit Agency | F | California | 50.7 |
| Palo Verde Valley Transit Agency | B | — | 81.0 |
| Palos Verdes Peninsula Transit Authority (PVPTA) | F | — | 43.1 |
| Palos Verdes Peninsula Transit Authority (PVPTA) | F | California | 43.1 |
| Paratransit Services | C | Washington | 75.5 |
| PART Putnam Area Rapid Transit | D | New York | 65.2 |
| Pasadena Transit | B | — | 81.3 |
| Pasco County Public Transportation | F | Florida | 45.3 |
| Pasco County Public Transportation | F | Florida | 45.3 |
| PATCO Speedline | A | New Jersey | 93.6 |
| PATCO Speedline | A | New Jersey | 100.0 |
| Patriots Party Boats | B | Massachusetts | 82.4 |
| Patriots Party Boats | B | Massachusetts | 82.4 |
| Pensacola Bay City Ferry | A | Florida | 96.5 |
| People for People (Community Connector) | B | Washington | 83.6 |
| People Mover | C | Oregon | 74.8 |
| Petaluma Transit | F | — | 48.1 |
| Petaluma Transit | F | California | 48.1 |
| Peter Pan | F | Massachusetts | 43.7 |
| Peter Pan | F | Massachusetts | 43.7 |
| Petersburg Area Transit | C | Virginia | 74.1 |
| Petersburg Area Transit | C | Virginia | 74.1 |
| Philly PHLASH | A | Pennsylvania | 95.0 |
| Philomath Connection | F | Oregon | 46.4 |
| Philomath Connection | C | Oregon | 75.2 |
| Philomath Connection | F | Oregon | 46.4 |
| Piedmont Authority for Regional Transportation (PART) | B | North Carolina | 84.9 |
| Piedmont Authority for Regional Transportation (PART) | B | North Carolina | 84.9 |
| Pierce Transit | C | Washington | 79.7 |
| Pinellas Suncoast Transit Authority (PSTA) | F | Florida | 34.2 |
| Pioneer Valley Transit Authority (PVTA) | F | Massachusetts | 30.3 |
| Pioneer Valley Transit Authority (PVTA) | F | Massachusetts | 44.7 |
| Placer County | C | — | 75.8 |
| Placer County | C | California | 75.8 |
| Placer County Transit | B | — | 80.5 |
| Placer County Transit | B | California | 80.5 |
| Playa Vista Shuttle | F | California | 46.4 |
| Playa Vista Shuttle | F | California | 46.4 |
| Plumas Transit | C | — | 79.5 |
| Plumas Transit | C | California | 79.5 |
| Plymouth & Brockton Street Railway Co | B | Massachusetts | 88.3 |
| Plymouth & Brockton Street Railway Co | B | Massachusetts | 88.3 |
| Pocatello Regional Transit | A | Idaho | 94.8 |
| Pony Express | D | Virginia | 66.5 |
| Pony Express | D | Virginia | 66.5 |
| Port Authority of Allegheny County | C | Pennsylvania | 75.4 |
| Port Authority Trans-Hudson (PATH) | F | New Jersey | 52.9 |
| Port Authority Trans-Hudson (PATH) | F | New Jersey | 52.9 |
| Portage Area Regional Transportation Authority (PARTA) | F | Ohio | 36.8 |
| Portage Area Regional Transportation Authority (PARTA) | F | Ohio | 57.6 |
| Porterville Transit | F | — | 36.5 |
| Porterville Transit | F | California | 36.5 |
| Potomac and Rappahannock Transportation Commission (PRTC) | F | Virginia | 19.0 |
| Potomac and Rappahannock Transportation Commission (PRTC) Omniride | F | Virginia | 38.4 |
| Prairie Express Transit | C | Colorado | 75.5 |
| Prairie Express Transit | C | Colorado | 75.5 |
| Prince George's County (The Bus) | C | Maryland | 73.3 |
| Pueblo Transit | B | Colorado | 80.3 |
| Puget Sound Consolidated GTFS | F | Washington | 44.8 |
| Puget Sound Educational Service District | C | Washington | 75.5 |
| Puget Sound Express | F | Washington | 53.7 |
| Puget Sound Express | F | Washington | 53.7 |
| Pulaski Area Transit (PAT) | F | Virginia | 42.6 |
| Pulaski Area Transit (PAT) | C | Virginia | 74.0 |
| Qline Detroit | F | Michigan | 50.4 |
| Qline Detroit | F | Michigan | 50.4 |
| Quail Trail Public Transit | C | Oregon | 78.6 |
| Queen Anne's County Ride | F | Maryland | 59.2 |
| Queens Bus | D | New York | 68.7 |
| Rabbit Transit | F | Pennsylvania | 34.6 |
| RADAR | B | Virginia | 86.5 |
| RADAR | B | Virginia | 86.5 |
| Radford Transit | F | Virginia | 54.8 |
| Radford Transit | C | Virginia | 75.5 |
| Rail | F | California | 53.9 |
| Rail | F | New Jersey | 43.2 |
| Rail | C | Pennsylvania | 74.0 |
| Rail | F | District of Columbia | 26.7 |
| Red Apple Transit | F | New Mexico | 56.7 |
| Red Apple Transit | F | New Mexico | 56.7 |
| Red Rose Transit Authority (RRTA) | F | Pennsylvania | 48.0 |
| Red Rose Transit Authority (RRTA) | C | Pennsylvania | 71.3 |
| Redding Area Bus Authority | F | — | 56.9 |
| Redding Area Bus Authority | A | California | 91.9 |
| Redding Area Bus Authority (RABA) | F | — | 26.4 |
| Redding Area Bus Authority (RABA) | F | California | 26.4 |
| Redding Area Bus Authority (RABA) | F | California | 37.3 |
| Reds Meadow Shuttle | B | — | 85.6 |
| Redwood Coast Transit (RCT) | F | — | 55.5 |
| Redwood Coast Transit (RCT) | F | California | 55.5 |
| Regional Transit Service | F | New York | 37.6 |
| Regional Transit Service Seneca (RTS Seneca) | F | New York | 38.8 |
| Regional Transportation Agency of Central Maryland (RTA) | F | Maryland | 59.3 |
| Regional Transportation Agency of Central Maryland (RTA) | F | Maryland | 55.8 |
| Regional Transportation Commission (RTC) | B | Nevada | 82.1 |
| Regional Transportation Commission (RTC) | B | Nevada | 82.1 |
| Regional Transportation Commission of Southern Nevada (RTC) | F | California | 33.1 |
| Regional Transportation Commission of Southern Nevada (RTC) | F | Nevada | 51.6 |
| Regional Transportation District (RTD) | C | Colorado | 76.1 |
| reLAXsan | F | — | 54.4 |
| Rensselaer County (Yankee Trails) | C | New York | 74.1 |
| Rhode Island Public Transit Authority | F | Rhode Island | 50.0 |
| Rhody Express | B | Oregon | 80.3 |
| Ride Connection | B | Oregon | 83.4 |
| RIDE Sitka | F | Alaska | 52.9 |
| Ridgecrest Transit | F | — | 52.3 |
| Ridgerunner | F | — | 19.5 |
| Ridgerunner | F | California | 19.5 |
| Rio Metro Regional Transit District | D | New Mexico | 63.0 |
| Rio Vista Delta Breeze | F | — | 52.0 |
| Rio Vista Delta Breeze | F | California | 52.0 |
| RiverCities Transit (RCT) | B | Washington | 80.3 |
| RiverCities Transit (RCT) | B | Washington | 80.3 |
| Riverside Transit Agency | C | California | 73.8 |
| RoadRunner | F | Arizona | 52.5 |
| RoadRunner | F | Arizona | 52.5 |
| RoadRUNNER Transit | D | New Mexico | 61.8 |
| RoadRUNNER Transit | F | New Mexico | 53.6 |
| RoadRUNNER Transit | D | New Mexico | 61.8 |
| RoadrunnerTransit | C | Colorado | 72.3 |
| Roaring Fork Transportation Authority | B | Colorado | 83.7 |
| Roaring Fork Transportation Authority | B | Colorado | 83.7 |
| Roaring Fork Transportation Authority | B | Colorado | 84.6 |
| Rochester City Lines | F | Minnesota | 50.8 |
| Rochester-Genesee Regional Transportation Authority (RGRTA) | D | New York | 62.3 |
| Rochester-Genesee Regional Transportation Authority (RGRTA) | D | New York | 64.7 |
| Rock Region Metro | F | Arkansas | 39.7 |
| Rock Region Metro | F | Arkansas | 36.9 |
| Rockingham MOOver | B | Vermont | 81.1 |
| Rocky Mountain National Park Shuttles | B | Colorado | 81.3 |
| Rocky Mountain National Park Shuttles | B | Colorado | 81.3 |
| Rocky Mountain National Park Shuttles | B | Colorado | 81.3 |
| Rogue Valley Transportation District (RVTD) | F | Oregon | 47.4 |
| Rogue Valley Transportation District (RVTD) | F | Oregon | 47.4 |
| Rogue Valley Transportation District (RVTD) | F | Oregon | 44.1 |
| Rogue Valley Transportation District (RVTD) | D | Oregon | 68.0 |
| Roosevelt Island Operating Corporation Tramway (RIOC Tramway) | A | New York | 92.9 |
| Roosevelt Island Operating Corporation Tramway (RIOC Tramway) | A | New York | 92.9 |
| Rosemead Explorer | F | California | 46.7 |
| Rosemead Explorer | F | — | 55.1 |
| Roseville Transit | D | — | 67.5 |
| Rural Community Transportation (RCT) | B | Vermont | 83.1 |
| Rural Community Transportation (RCT) | B | Vermont | 81.2 |
| Rural Community Transportation (RCT) | B | Vermont | 81.3 |
| ruralTRANSIT | C | Washington | 76.4 |
| ruralTRANSIT | C | Washington | 76.4 |
| Ryde Racine | F | Wisconsin | 45.3 |
| Ryde Racine | C | Wisconsin | 78.4 |
| Ryde Racine | F | Wisconsin | 45.3 |
| Sacramento Regional Transit (SacRT) | F | California | 59.6 |
| Sacramento Regional Transit (SacRT) | F | California | 59.6 |
| Sacramento Regional Transit (SacRT) | F | California | 39.1 |
| Sage Stage | B | — | 86.0 |
| Sage Stage | B | California | 86.0 |
| Saint Maryʼs Transit System | F | Maryland | 42.6 |
| Saint Maryʼs Transit System | D | Maryland | 66.2 |
| San Benito County Express (SBCE) | F | — | 50.4 |
| San Benito County Express (SBCE) | F | California | 50.4 |
| San Diego International Airport, Metropolitan Transit System (MTS) | F | California | 54.1 |
| San Francisco Bay Area Water Emergency Transportation Authority (WETA) | A | California | 90.3 |
| San Francisco Bay Area Water Emergency Transportation Authority (WETA) | A | California | 90.3 |
| San Francisco Bay Area Water Emergency Transportation Authority (WETA) | A | California | 90.3 |
| San Francisco Municipal Transportation Agency (SFMTA - Muni) | F | California | 31.6 |
| San Francisco Municipal Transportation Agency (SFMTA - Muni) | D | — | 60.4 |
| San Joaquin Regional Transit District | B | — | 80.2 |
| San Joaquin Regional Transit District (RTD) | D | California | 61.6 |
| San Juan Capistrano Free Weekend Trolley | F | — | 46.4 |
| San Juan Capistrano Free Weekend Trolley | F | California | 46.4 |
| San Leandro Links | F | — | 44.5 |
| San Leandro Links | F | California | 44.5 |
| San Luis Obispo Regional Transit Authority (SLORTA) | B | — | 81.7 |
| San Mateo County Transit District (samTrans) | C | California | 71.1 |
| San Miguel Authority for Regional Transportation (SMART) | F | Colorado | 48.7 |
| San Miguel Authority for Regional Transportation (SMART) | F | Colorado | 48.7 |
| San Miguel County | B | Colorado | 83.4 |
| Sandia Shuttle | F | New Mexico | 49.4 |
| Sandia Shuttle | F | New Mexico | 49.4 |
| Sandy Area Metro (SAM) | C | Oregon | 80.0 |
| Sanford Trolley | F | Florida | 57.0 |
| Santa Barbara Metropolitan Transit District (MTD) | B | — | 85.6 |
| Santa Clara Valley Transportation Authority (VTA) | D | California | 68.4 |
| Santa Cruz Metro (SCMTD) | F | California | 56.2 |
| Santa Cruz Metro (SCMTD) | A | California | 92.4 |
| Santa Fe Trails | D | New Mexico | 64.8 |
| Santa Fe Trails | D | New Mexico | 64.8 |
| Santa Maria Area Transit | F | — | 33.6 |
| Santa Maria Area Transit | D | California | 60.2 |
| Santa Maria Area Transit | F | California | 33.6 |
| Santa Rosa CityBus | F | California | 36.5 |
| Santa Rosa CityBus | F | — | 39.6 |
| Santa Ynez Valley Transit | A | — | 96.5 |
| Santa Ynez Valley Transit | A | California | 96.5 |
| Sarasota County Area Transit | F | Florida | 22.6 |
| Sarasota County Area Transit (SCAT) | F | Florida | 51.1 |
| Sarasota County Area Transit (SCAT) | F | Florida | 51.1 |
| Schuyler County Transit | F | New York | 45.9 |
| Seastreak Ferry | C | Massachusetts | 73.5 |
| Seattle Children's Hospital Shuttle | F | Washington | 37.9 |
| Sedona Shuttle | A | Arizona | 99.8 |
| Selah Transit | D | Washington | 62.4 |
| Service Discontinued | F | District of Columbia | 39.4 |
| Shawnee Mass Transit District | B | Illinois | 82.6 |
| Ship Island Excursions | A | Mississippi | 98.2 |
| Shore Line East | F | Connecticut | 47.9 |
| Shore Transit | F | Maryland | 42.3 |
| Shore Transit | F | Maryland | 49.2 |
| Shoreline Metro | B | Wisconsin | 83.1 |
| Shoreline Metro | B | Wisconsin | 83.1 |
| Shreveport and Bossier City | F | Louisiana | 34.7 |
| Shuttle Oregon | F | Oregon | 42.1 |
| Sierra Madre Gateway Coach | F | — | 48.5 |
| Sierra Madre Gateway Coach | F | California | 54.1 |
| Sierra Madre Gateway Coach | F | California | 48.5 |
| Simi Valley Transit | F | — | 56.6 |
| Simi Valley Transit | F | California | 56.6 |
| Sioux Area Metro (SAM) | F | South Dakota | 50.0 |
| Sioux Area Metro (SAM) | F | South Dakota | 50.0 |
| Sioux City Transit System | B | Iowa | 82.6 |
| Sioux City Transit System | B | Iowa | 82.6 |
| Siskiyou County | B | — | 81.8 |
| Siskiyou County | B | California | 81.8 |
| Skamania County Transit | B | Washington | 80.2 |
| Snoqualmie Valley Transportation | B | Washington | 81.7 |
| Snowmass Village Transportation | C | Colorado | 75.5 |
| Snowmass Village Transportation | C | Colorado | 75.5 |
| SolTrans (Solano County Transit) | A | — | 94.1 |
| Sonoma County Airport Express | F | — | 49.4 |
| Sonoma County Airport Express | F | California | 49.4 |
| Sonoma County Transit (SCT) | D | — | 67.3 |
| Sonoma County Transit (SCT) | D | California | 67.3 |
| Sonoma-Marin Area Rail Transit (SMART) | A | — | 98.9 |
| Sonoma-Marin Area Rail Transit (SMART) | A | California | 98.9 |
| Sound Transit | B | Washington | 82.9 |
| Sound Transit, Metro Transit, City of Seattle - King County Metro | B | Washington | 89.2 |
| South Clackamas Transportation District | C | Oregon | 72.9 |
| South County Transit Link | F | — | 30.0 |
| South County Transit Link | F | California | 30.0 |
| South Florida Regional Transportation Authority (Tri-Rail) | D | Florida | 67.4 |
| South Metro Area Regional Transit (SMART) | F | Oregon | 30.1 |
| South Metro Area Regional Transit (SMART) | F | Oregon | 30.1 |
| South Metro Area Regional Transit (SMART) | C | Oregon | 72.1 |
| South Portland | F | Maine | 37.2 |
| South Portland | F | Maine | 37.0 |
| South Rim Shuttle | A | Arizona | 98.2 |
| South Shore Line | B | Indiana | 89.7 |
| Southeast Area Transit District | F | Connecticut | 44.5 |
| Southeast Area Transit District | C | Connecticut | 78.0 |
| Southeast Area Transit District | F | Connecticut | 44.5 |
| Southeastern Regional Transit Authority (SRTA) | F | Massachusetts | 52.4 |
| Southeastern Regional Transit Authority (SRTA) | F | Massachusetts | 51.5 |
| SouthWest POINT | F | Oregon | 48.5 |
| Spirit Bus | F | — | 52.3 |
| Spirit Bus | D | California | 65.0 |
| Spirit Bus | F | California | 52.3 |
| Spokane Transit Authority (STA) | B | Washington | 82.4 |
| Springfield Mass Transit District (SMTD) | F | Illinois | 55.7 |
| Springfield Mass Transit District (SMTD) | C | — | 73.3 |
| Springfield MicroMoo | D | Vermont | 62.8 |
| Squaxin Island Transit | F | Washington | 53.8 |
| Squaxin Island Transit | B | Washington | 83.1 |
| Squaxin Island Transit | F | Washington | 53.8 |
| St Lawrence County Public Transit | F | New York | 40.4 |
| St Lawrence County Public Transit | F | New York | 55.5 |
| St. Mary's Transit System (STS) | F | Maryland | 42.6 |
| Stagecoach Transportation Services (STS) | F | Vermont | 21.4 |
| Stagecoach Transportation Services (STS) | F | Vermont | 21.4 |
| Stanford Marguerite Shuttle (SMS) | A | California | 92.9 |
| Stanislaus Regional Transit (StaRT) | F | — | 47.6 |
| Stanislaus Regional Transit (StaRT) | C | California | 75.2 |
| Stanislaus Regional Transit (StaRT) | F | California | 47.6 |
| Stanislaus Regional Transit Authority | F | — | 44.4 |
| Stanislaus Regional Transit Authority (StanRTA) | F | — | 42.7 |
| STAR Transit | B | Texas | 85.4 |
| STAR Transit | B | Texas | 85.4 |
| STAR Transit | C | Virginia | 78.2 |
| Stark Area Regional Transit Authority (SARTA) | F | Ohio | 29.2 |
| Stark Area Regional Transit Authority (SARTA) | F | Ohio | 51.3 |
| StarMetro | F | Florida | 56.8 |
| StarMetro | F | Florida | 56.8 |
| StarTran | F | Nebraska | 52.1 |
| StarTran | D | Nebraska | 68.2 |
| Staten Island Bus | D | New York | 68.4 |
| Static feed for realtime | D | Oregon | 65.7 |
| Static feed for realtime | D | Oregon | 61.5 |
| Steel Valley Regional Transit Authority | F | Ohio | 45.9 |
| Steuben Area Rides | F | New York | 18.2 |
| Steuben County Transit | F | New York | 26.5 |
| Streamline | B | Montana | 80.3 |
| Streamline | B | Montana | 80.3 |
| Suburban Mobility Authority for Regional Transit (SMART) | B | Michigan | 84.7 |
| Suffolk County Transit | F | New York | 32.5 |
| Suffolk County Transit | F | New York | 56.7 |
| Sullivan County Transit | F | New York | 51.7 |
| Summit Stage | C | Colorado | 79.6 |
| Summit Stage | C | Colorado | 79.6 |
| Sun Metro | C | Texas | 71.3 |
| SunLine Transit Agency | F | — | 20.3 |
| Sunset Empire Transportation District (SETD), Tillamook County Transportation District, Columbia County Rider | B | Oregon | 81.4 |
| Sunshine Bus Company | F | Florida | 41.2 |
| Sunshine Bus Company | F | Florida | 41.2 |
| SunTran | F | Arizona | 47.2 |
| SunTran | F | Arizona | 55.7 |
| SunTran | F | Florida | 54.6 |
| SunTran Utah | F | Utah | 58.6 |
| Swan Island Evening Shuttle | C | Oregon | 79.8 |
| Taft Area Transit | F | — | 51.1 |
| Taft Area Transit | F | California | 51.1 |
| Tahoe Transportation District | D | Nevada | 69.0 |
| Tahoe Transportation District | D | Nevada | 69.0 |
| Tar River Transit | C | North Carolina | 70.5 |
| Tar River Transit | C | North Carolina | 70.5 |
| Tehama Rural Area Express (TRAX), Susanville Indian Rancheria Public Transportation Program | F | — | 51.4 |
| Tehama Rural Area Express (TRAX), Susanville Indian Rancheria Public Transportation Program | F | California | 51.4 |
| Teller Senior Coalition Transit (TSC Transit) | B | Colorado | 86.6 |
| Teller Senior Coalition Transit (TSC Transit) | B | Colorado | 86.6 |
| Terre Haute Transit Utility | F | Indiana | 52.0 |
| Terre Haute Transit Utility | F | Indiana | 52.0 |
| The Bus | B | Alaska | 81.6 |
| The Bus | B | Alaska | 81.6 |
| The Comet | F | South Carolina | 36.3 |
| The Comet | F | South Carolina | 36.3 |
| The Comet | C | South Carolina | 78.2 |
| The Current | F | Vermont | 39.5 |
| The Current | F | Vermont | 39.5 |
| The JO | F | Kansas | 40.9 |
| The Jule | F | Iowa | 41.8 |
| The Jule | C | Iowa | 76.0 |
| The Moccasin Express | B | Washington | 82.2 |
| The Rapid | D | Michigan | 69.1 |
| The Santa Cruzer | A | — | 92.0 |
| The Victoria Clipper | F | Washington | 58.1 |
| TheBus | F | Hawaii | 9.5 |
| TheBus | F | Hawaii | 39.4 |
| Thousand Oaks Transit | C | — | 72.7 |
| Thousand Oaks Transit | C | California | 72.7 |
| Thousand Oaks Transit - Kanan Shuttle | F | — | 56.6 |
| Tompkins Consolidated Area Transit Inc | C | New York | 73.3 |
| Torrance Transit | F | California | 54.3 |
| Town of Estes Park | C | Colorado | 72.8 |
| Town of Mountain Village | F | Colorado | 51.1 |
| Town of Mountain Village | F | Colorado | 51.1 |
| Town of Telluride | F | Colorado | 43.9 |
| Town of Telluride | F | Colorado | 43.9 |
| Towson Loop | C | Maryland | 70.9 |
| Transfort – City of Fort Collins (Transfort) | F | Colorado | 39.9 |
| Transit Authority of Northern Kentucky (TANK) | F | Kentucky | 30.6 |
| Transit Authority of Northern Kentucky (TANK) | C | Kentucky | 70.9 |
| Transit Authority of River City (TARC) | F | Kentucky | 16.4 |
| Transit Orange / Newburgh Local Transit | F | New York | 55.3 |
| Transportation Management Association of Chester County (TMACC) | C | — | 71.7 |
| Tri Delta Transit | F | California | 50.2 |
| Tri-Valley Transit | C | Vermont | 78.8 |
| Tri-Valley Transit | C | Vermont | 78.8 |
| TriMet, Portland Streetcar | C | Oregon | 70.0 |
| Trinity Metro | C | — | 75.1 |
| Trinity Transit | F | — | 53.7 |
| Trinity Transit | F | California | 53.7 |
| Trinity Transit | B | California | 87.6 |
| Tulare County Area Transit (TCAT) | C | — | 73.8 |
| Turlock Transit | B | — | 80.6 |
| Turlock Transit | B | California | 80.6 |
| UCSC Transportation and Parking Services | F | California | 50.8 |
| Ulster County Area Transit | F | New York | 53.3 |
| UNCW Seahawk Shuttle | F | North Carolina | 50.3 |
| UNCW Seahawk Shuttle | F | North Carolina | 48.2 |
| Union City Transit | F | — | 51.9 |
| Union Gap | B | Washington | 83.1 |
| Union Gap | B | Washington | 83.1 |
| Unitrans (ASUCD / City of Davis) | B | — | 80.8 |
| University of California Berkeley Shuttle (Bear Transit) | F | — | 45.1 |
| University of California Berkeley Shuttle (Bear Transit) | F | California | 45.1 |
| University of Colorado Boulder | C | Colorado | 73.3 |
| University of Colorado Boulder | C | Colorado | 73.3 |
| University of Iowa - CAMBUS (CAMBUS) | C | Iowa | 73.9 |
| University of Iowa - CAMBUS (CAMBUS) | C | Iowa | 73.9 |
| University of Michigan Transit Services | F | Michigan | 48.6 |
| University of Michigan Transit Services | C | Michigan | 72.3 |
| University of Montana (UDASH) | F | Montana | 49.9 |
| University of Montana (UDASH) | F | Montana | 49.9 |
| Upper Merion Rambler | B | — | 81.7 |
| USF Bull Runner | C | Florida | 70.2 |
| UTA | F | Utah | 19.6 |
| UTA | F | Utah | 48.6 |
| Utah Transit Authority (UTA) | F | Utah | 48.6 |
| UTrans | F | Oregon | 48.6 |
| UTrans | F | Oregon | 48.6 |
| Vail Transit | B | Colorado | 80.0 |
| Vail Transit | B | Colorado | 80.0 |
| Valley Metro | F | Virginia | 46.3 |
| Valley Metro | F | Virginia | 46.3 |
| Valley Metro | F | Virginia | 33.0 |
| Valley Metro (VM) | B | Arizona | 80.1 |
| Valley Regional Transit | C | Idaho | 78.6 |
| Valley Retriever Busline | F | Oregon | 44.5 |
| Valley Transit (WI) | F | Wisconsin | 47.3 |
| Valley Transit (WI) | D | Wisconsin | 60.3 |
| Valparaiso Transit | B | Indiana | 84.9 |
| Valparaiso Transit | B | Indiana | 84.9 |
| Ventura County Transportation Commission | F | — | 45.8 |
| Ventura County Transportation Commission | B | California | 82.4 |
| Ventura County Transportation Commission | F | California | 45.8 |
| Verde Lynx | F | Arizona | 51.3 |
| Verde Lynx | F | Arizona | 51.3 |
| Vermont Translines | D | Vermont | 68.6 |
| Vermont Translines | D | Vermont | 68.6 |
| VIA Metropolitan Transit (VIA) | F | Texas | 12.4 |
| VIA Metropolitan Transit (VIA) | F | Texas | 51.1 |
| Via Mobility | F | Colorado | 50.0 |
| Via Mobility | F | Colorado | 50.0 |
| Via Mobility | D | Colorado | 65.0 |
| Victor Valley Transit Authority (VVTA) | F | California | 43.7 |
| Victor Valley Transit Authority (VVTA) | F | California | 43.7 |
| Village of Cooperstown Trolly System | F | New York | 44.7 |
| VINE Transit | B | — | 87.8 |
| Vineyard Fast Ferry | C | Rhode Island | 76.5 |
| Vineyard Fast Ferry | C | Rhode Island | 76.5 |
| Virginia Breeze | F | Virginia | 40.4 |
| Virginia Railway Express (VRE) | F | Virginia | 28.3 |
| Virginia Regional Transit | B | Virginia | 83.2 |
| Virginia Regional Transit | B | Virginia | 83.2 |
| Votran | F | Florida | 39.2 |
| Wahkiakum Ferry | F | Washington | 48.5 |
| Wahkiakum Ferry | B | Washington | 83.1 |
| Wahkiakum Ferry | F | Washington | 48.5 |
| Wahkiakum on the Move | B | Oregon | 81.8 |
| Wahkiakum on the Move | B | Oregon | 81.8 |
| Wallowa Community Connection (WCC), Northeast Oregon Public Transit | B | Oregon | 80.1 |
| Washington County Transit | F | Maryland | 29.4 |
| Washington County Transit | C | Maryland | 78.3 |
| Washington Park Shuttle | F | Oregon | 58.8 |
| Washington State Department of Transportation (WSDOT Apple Line) | C | Washington | 70.1 |
| Washington State Ferries | F | Washington | 51.5 |
| Washington State Ferries | F | Washington | 37.8 |
| Water Avenue Shuttle | F | Oregon | 41.5 |
| Watertown Citibus | F | New York | 45.7 |
| Watertown Citibus | D | New York | 63.7 |
| Waukesha Metro Transit | F | Wisconsin | 51.6 |
| Waukesha Metro Transit | F | Wisconsin | 51.6 |
| West Berkeley Shuttle | F | California | 47.3 |
| West Berkeley Shuttle | F | California | 47.3 |
| WestCAT | C | — | 76.2 |
| WestCAT | C | California | 76.2 |
| Westchester County Bee-Line System (WCDOT) | D | New York | 62.5 |
| Westchester County Bee-Line System (WCDOT) | F | New York | 30.4 |
| Western Reserve Transit Authority | F | Ohio | 16.9 |
| Whatcom Transportation Authority | A | Washington | 94.2 |
| Wheatland Ferry | B | Oregon | 82.2 |
| Whitehorse Transit (Yukon) | F | CA | 58.7 |
| Wichita Transit | F | Kansas | 11.7 |
| Williamsburg Area Transit Authority | F | Virginia | 43.0 |
| Williamsburg Area Transit Authority | F | Virginia | 58.6 |
| Williamsburg Area Transit Authority | F | Virginia | 43.0 |
| Williamsburg Area Transit Authority (WATA) | F | Virginia | 35.1 |
| Winter Park Transit | C | Colorado | 77.0 |
| Winter Park Transit | C | Colorado | 77.0 |
| WinTran | F | Virginia | 59.5 |
| WinTran | F | Virginia | 59.5 |
| Woodburn Transit Service (WTS) | B | Oregon | 84.0 |
| Worcester Regional Transit Authority (WRTA) | F | Massachusetts | 54.7 |
| Worcester Regional Transit Authority (WRTA) | F | Massachusetts | 54.7 |
| Xpress | F | Georgia | 56.7 |
| Xpress | F | Georgia | 56.7 |
| Yakima Transit | F | Washington | 28.4 |
| Yamhill County Transit Area | B | Oregon | 81.7 |
| Yankee Line | B | Massachusetts | 87.5 |
| Yankee Line | B | Massachusetts | 87.5 |
| Yates Transit Service | F | New York | 34.7 |
| Yolo County Transportation District (Yolobus) | F | California | 55.4 |
| Yolobus (Yolo County Transportation District) | B | — | 82.5 |
| Yosemite Area Regional Transportation System (YARTS) | F | — | 53.7 |
| Yosemite Area Regional Transportation System (YARTS) | F | California | 47.5 |
| Yosemite Area Regional Transportation System (YARTS) | F | California | 53.7 |
| Yuba-Sutter Transit | C | — | 79.3 |
| Yuba-Sutter Transit | C | California | 79.3 |
| Yuma County Intergovernmental Public Transportation Authority (YCIPTA) | D | Arizona | 69.3 |