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Feed status · checked 2026-09-13

Cardiff Bus (Bws Caerdydd)

Based on the official feed source on file

Service mode Bus

24.8 / 100

unchanged since 2026-09-12

Catalogued in Cardiff [Caerdydd GB-CRD], United Kingdom.

Feed expiredAccessibility gapsRealtime not yet published

Heads-up: Days until the service window ends dropped by 357 between 2026-08-10 and 2026-09-01, but only 22 day(s) passed. The feed's calendar appears to have moved backward, which can happen when an older export is republished. Worth confirming the latest export is the one being served. (checked 2026-09-01). This can be a brief vendor export glitch; watch the next update before acting.

A data-quality and completeness lens to help an agency improve its GTFS feed. Not an official compliance determination from any transit program. New to this? How to read your scorecard. Interactive view of this scorecard. Rubric v1.3, validator 8.0.1.

Checked for changes 30 hours ago; last changed 3 days ago.

Measured 3 of 4 score categories from the official feed URL on file.

How we measured this

Confidence in this measurement: medium.

  • Realtime quality was not measured this run. It does not count against the grade.
  • The feed was downloaded from the official feed URL on file.

Confidence describes how much the pipeline could measure this run, not the feed itself. It never changes the grade.

Top things to fix

Fix 01

Re-export the feed with a calendar that reaches further out. Set feed_end_date in feed_info.txt past your next service change.Likely your export tool

Service data ended 0 day(s) ago. When the calendar runs out, trip planners stop showing this agency even though the buses are still running. Riders are told the service does not exist.

⏱ Usually one export setting; export on a schedule so it never lapses again.worth about +100 points in its category

Fix 02

Review the rule documentation for 'block_trips_with_overlapping_stop_times' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.

Block trips with overlapping stop times (flagged by the MobilityData validator). See the linked rule for what this affects.

⏱ Varies.worth about +24 points in its category

Fix 03

Review the rule documentation for 'point_near_origin' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.

Point near origin (flagged by the MobilityData validator). See the linked rule for what this affects.

⏱ Varies.worth about +12 points in its category

Finding handoff

Move one finding to a recheck

Select one finding. Copy the request, make the change in the feed-producing tool, then compare the next complete run.

Feed evidence
Service data ended 0 day(s) ago.
Next action
Re-export the feed with a calendar that reaches further out. Set feed_end_date in feed_info.txt past your next service change.
Recheck
Publish the changed feed at the same URL. On the next complete, comparable scorecard run, confirm that this finding is no longer reported.
Copy handoff text
How to make and check these changes

Check the result on the published feed. Read the guide, make the change in your tool, and use the next comparable run to see whether the finding is still reported. Only an action or ticket record can attribute who made the change.

  1. Re-export the feed with a calendar that reaches further out. Set feed_end_date in feed_info.txt past your next service change. · Read the fix guide for scorecard_feed_expired

    Make the change. Make this change in whatever tool produces your feed, then re-export.

    Check the result. The next scorecard run checks this finding again. If a comparable check no longer reports it, the feed's clearance log records that result. This confirms feed state, not who made the change. See this feed's finding-clearance log.

  2. Review the rule documentation for 'block_trips_with_overlapping_stop_times' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.

    Make the change. Make this change in whatever tool produces your feed, then re-export.

    Check the result. The next scorecard run checks this finding again. If a comparable check no longer reports it, the feed's clearance log records that result. This confirms feed state, not who made the change. See this feed's finding-clearance log.

  3. Review the rule documentation for 'point_near_origin' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed.

    Make the change. Make this change in whatever tool produces your feed, then re-export.

    Check the result. The next scorecard run checks this finding again. If a comparable check no longer reports it, the feed's clearance log records that result. This confirms feed state, not who made the change. See this feed's finding-clearance log.

Rider view: what this feed publishes

A quick read of rider-facing information in this feed.

Schedule visibility
The feed's last published service date is today.
Published accessibility data
Accessibility information is stated for 0% of stops and 0% of trips. This measures published data, not whether stops or vehicles are physically usable.
Fare information
No fare information is published in the feed.
Realtime information
Realtime-feed availability and live-arrival coverage are not known from this scorecard.

Important: This does not rate service reliability. Riders should confirm current service alerts, fares, and accessibility accommodations with the transit operator before traveling.

Send your vendor a fix request

You may not control the GTFS export yourself. Copy this and send it to whoever runs your scheduling software export. It names each fix with the validator notice and a guide link.

Send the agency a note

Supporting this agency? Copy this and email it to them. It names what lapsed, why it matters to riders, and the one setting to change.

Score by category

Correctness30.0 / 100

The MobilityData validator flagged 9 kinds of issue across 231 instances (93 error, 138 warning, 0 informational).

Freshness0.0 / 100

Service data ended 0 day(s) ago. Trip planners have likely already dropped this feed.

Rider experience37.5 / 100

0% of stops state wheelchair accessibility (0% marked accessible, 0% marked not accessible). This measures what the feed publishes, not whether a stop is physically usable. Fare data is not published.

Accessibility0 / 100

0% of stops state accessibility (0% marked accessible). Reflects what the feed states, not verified physical usability.

2 accessibility depth signals

  • 23 route badge(s) pair a color and text color below the WCAG 4.5:1 contrast bar (1, 2, 8, 9, 13, and more).

    Consider: Adjust route_color or route_text_color so each pair clears 4.5:1. Often switching the text between black and white is enough.

  • 142 stop name(s) use abbreviations or symbols a screen reader may mispronounce, with no spoken form set ("Arnold Ave", "Arnold Ave", "Ball Road/Ball Lane", and more).

    Consider: Add tts_stop_name with the spoken form, e.g. 'Main Street and Second Avenue', for the affected stops.

Opportunities to strengthen the data, not deductions from the sub-score above. States what the second accessibility lens can check from the feed, not verified physical usability.

Realtime qualityNot yet measured

Not scored yet. Nothing here counts against the grade.

Routes and stops

Each route is drawn once, using the longest shape its trips follow; stops are the dots.

This feed has 1645 stops.

Skip to route and stop data

The route and stop data is ready below. Load the map only when you want the geographic view. It uses additional data.

Basemap: OpenFreeMap, © OpenStreetMap contributors. Routes and stops: this agency's GTFS feed.

  • 1 (gray)
  • 101 (white)
  • 102 (white)
  • 11 (white)
  • 13 (yellow)
  • 136 (white)
  • 14 (white)
  • 17 (red)
  • 18 (red)
  • 2 (gray)
  • 21 (green)
  • 23 (green)
  • 24 (green)
  • 25 (green)
  • 25A (white)
  • 27 (yellow)
  • 28 (green)
  • 29 (white)
  • 3 (white)
  • 30 (purple)
  • 305 (white)
  • 32 (white)
  • 35 (purple)
  • 4 (green)
  • 44 (green)
  • 45 (green)
  • 49 (brown)
  • 50 (brown)
  • 52 (purple)
  • 54 (purple)
  • 57 (teal)
  • 58 (teal)
  • 6 (teal)
  • 604 (gray)
  • 606 (gray)
  • 608 (gray)
  • 609 (gray)
  • 61 (red)
  • 610 (gray)
  • 611 (gray)
  • 619 (white)
  • 62 (white)
  • 63 (black)
  • 64 (gray)
  • 7 (white)
  • 8 (teal)
  • 86 (white)
  • 9 (yellow)
  • 92 (pink)
  • 92B (pink)
  • 93 (pink)
  • 93S (pink)
  • 94 (pink)
  • 95 (red)
  • 96 (gray)
  • B1 (white)
  • B2 (white)
  • H59 (teal)
  • M1 (gray)
  • Sky (white)
  • 30 (white)
Routes in Cardiff Bus (Bws Caerdydd)'s feed
RouteTypeLine color
1Busgray
101Buswhite
102Buswhite
11Buswhite
13Busyellow
136Buswhite
14Buswhite
17Busred
18Busred
2Busgray
21Busgreen
23Busgreen
24Busgreen
25Busgreen
25ABuswhite
27Busyellow
28Busgreen
29Buswhite
3Buswhite
30Buspurple
305Buswhite
32Buswhite
35Buspurple
4Busgreen
44Busgreen
45Busgreen
49Busbrown
50Busbrown
52Buspurple
54Buspurple
57Busteal
58Busteal
6Busteal
600Buswhite (no shape in feed)
604Busgray
606Busgray
608Busgray
609Busgray
61Busred
610Busgray
611Busgray
619Buswhite
62Buswhite
63Busblack
64Busgray
7Buswhite
8Busteal
86Buswhite
9Busyellow
92Buspink
92BBuspink
93Buspink
93SBuspink
94Buspink
95Busred
96Busgray
B1Buswhite
B2Buswhite
H59Busteal
M1Busgray
SkyBuswhite
30Buswhite
List every stop
  • St Olaves
  • Castleton (Post Office)
  • Bryn Hafren
  • Kingsway Centre
  • Kingsway
  • Bakery
  • Tredegar Park
  • St Thomas` Church
  • Shops
  • Maesglas Shops
  • Maesglas Post Office
  • Harlech Retail Park
  • Maesglas McDonald`s
  • Maesglas McDonald`s
  • Waterloo Road
  • Waterloo Road
  • Belle Vue Park
  • Belle Vue Park
  • Royal Gwent Hospital
  • Royal Gwent Hospital
  • Police Station
  • Police Station
  • Tredegar Park
  • Cleppa Park
  • Cleppa Park
  • Celtic Way
  • Celtic Way
  • Tavern Farm
  • Tavern Farm
  • Berryhill Farm
  • Berryhill Farm
  • Pound Hill
  • Pound Hill
  • Halfway Garage
  • Halfway Garage
  • Castleton (Coach & Horses)
  • Maesglas BP Garage
  • Ebbw Bridge Club
  • Newport (Friars Walk Bus Stn)
  • Park Drive
  • West Grove
  • West Grove
  • West Grove 3
  • Infirmary
  • Infirmary
  • Elm Street
  • Oakfield Street
  • Stacey Road
  • Royal Oak
  • City Link
  • Colchester Avenue Bottom
  • Ipswich Road
  • Castle Avenue
  • Ty Mawr Road
  • Carpenters Arms
  • Llanrumney Ave
  • Highcroft
  • Taunton Crescent
  • High School
  • Mount Pleasant Avenue
  • Bluebell Inn
  • Llaneirwg Way
  • Wern Fawr Lane
  • Vaindre Lane
  • Llaneirwg Way
  • Bluebell Inn
  • The Mount
  • St Illtyds H S
  • Llanrumney Avenue
  • Lynton Terrace
  • Eastern Leisure Centre
  • Eastern Leisure Centre
  • Watchet Close
  • Worle Avenue
  • Bideford Road
  • Cheddar Crescent
  • Clevedon Court
  • Clevedon Court
  • Countisbury Avenue
  • Countisbury Avenue
  • Elgar Crescent
  • Elgar Crescent
  • Bluebell Drive
  • Bluebell Drive
  • Okehampton Avenue
  • Arnold Ave
  • Arnold Ave
  • Hazlitt Close
  • Hazlitt Close
  • Siloam Baptist
  • Shaw Close
  • Laureate Close
  • Laureate Close
  • Eastern Leisure Centre
  • Worle Avenue
  • Lynton Terrace
  • Ball Road/Ball Lane
  • Ball Road/Ball Lane
  • Llanrumney Hall
  • Llanrumney Hall
  • Mount Pleasant Ave
  • High School
  • Witla Court
  • Highcroft
  • Claremont Crescent
  • Carpenters Arms
  • Ty Mawr Road
  • The Potteries
  • Ty Mawr Avenue
  • Tredelerch Road
  • Highlands
  • Brachdy Lane
  • Brachdy Lane
  • Quarry Dale
  • Quarry Dale
  • Mardy Road
  • Downton Grange
  • Heron Road
  • Heron Road
  • Harris Avenue
  • St Hilary Church
  • Towyn Road
  • Towyn Road
  • Trowbridge Road
  • Trowbridge Road
  • Brynbala Way
  • Brynbala Way
  • Glan y Mor Road
  • Glan y Mor Road
  • Cemaes Crescent
  • Cemaes Way
  • Trebanog Crescent
  • Port Madoc Road
  • Abergele Road
  • Tresigin Road
  • Willowbrook Drive
  • Coleford Drive
  • St Mellons Police Station
  • Heritage Inn
  • Heritage Park
  • Sanderling Drive
  • Willowdene Way
  • Willowbrook School
  • Crickhowell Road
  • Meadowlane Primary School
  • Clos Gwlad-Yr-Haf
  • Kwik Save
  • Llaneirwg Way
  • Llaneirwg Way
  • Tarwick Drive
  • Tarwick Drive
  • Ty Coch Court
  • Hendre Road
  • Hendre Road
  • Abergele Road
  • Abergele Road
  • Trowbridge Road
  • Rhyl Road
  • Rhyl Road
  • Nevin Crescent
  • Nevin Crescent
  • Manorbier Cres
  • Manorbier Cres
  • Oswestry Close (Caeglas Road)
  • Castlefield Centre
  • Wentloog Rd
  • Caeglas Rd
  • New Road
  • New Road
  • Caeglas Road
  • Caeglas Rd
  • Nursery School
  • Junior School
  • Ty Fry Road
  • Ty Fry Road
  • Ipswich Road
  • Colchester Avenue Bottom
  • City Link
  • Royal Oak
  • Baron's Court Rd
  • Colchester Avenue (Howardian Close)
  • Colchester Avenue
  • Sainsbury's
  • Sainsbury's
  • Stacey Road
  • Priest Road
  • Piercefield Place
  • Infirmary
  • Infirmary
  • Blind Institute
  • West Grove
  • West Grove
  • Richmond Crescent
  • Richmond Crescent
  • Lowther Road
  • Lowther Road
  • Arabella Street
  • Alfred Street
  • Claude Hotel
  • Roath Court Place
  • Timbers Square
  • Timbers Square
  • Roath Court Place
  • Claude Hotel
  • Angus Street
  • Arabella Street
  • Library
  • Library
  • Melrose Avenue
  • Bronwydd Avenue
  • Greenlawns
  • Greenlawns
  • Penylan Terrace
  • Ysgol Bro Edern
  • Ysgol Bro Edern
  • Llanedeyrn Road
  • Llanedeyrn Road
  • Queenwood
  • Queenwood
  • Ael y Bryn
  • Ael y Bryn
  • Pensylvania
  • Pensylvania
  • Glenwood
  • Glenwood
  • Wellwood
  • Wellwood
  • Maelfa
  • Maelfa
  • Brynfedw
  • Roundwood
  • Coed -Y-Gores
  • Coed -Y-Gores
  • Wern Goch
  • Wern Goch
  • Holly Bush
  • Glyncoed School
  • Llwyn Castan
  • Llwyn Castan
  • Aldi
  • Aldi
  • Glyn Eiddw
  • Glyn Eiddw
  • Pentwyn Drive
  • Pentwyn Drive
  • Bupa
  • Bupa
  • The Farthings
  • The Farthings
  • Sindercombe Cl
  • and 1395 more (see the full list on the map or in the GeoJSON)

Over time

Overall score across the last 6 checks — unchanged since 2026-09-12.

2026-08-06: 56.22026-08-07: 56.22026-08-10: 56.22026-09-01: 38.82026-09-12: 24.82026-09-13: 24.8
Show the numbers
Overall score by check, with the change from the previous check
CheckScoreChange
2026-08-0656.2 first check
2026-08-0756.2 no change
2026-08-1056.2 no change
2026-09-0138.8 down 17.4
2026-09-1224.8 down 14.0
2026-09-1324.8 no change

What changed since your last check

  • Correctness no change
  • Freshness no change
  • Rider experience no change

What changed over time

On 2026-08-06 this feed started at grade F. On 2026-09-01 feed entered the expiry window (3 days of service left). On 2026-09-13 feed expired. On 2026-09-13 the check no longer reported: the feed has a stretch of two weeks or more with no service running; on some trips the stops fall along the route line in a different order than the schedule lists. As of 2026-09-13 it holds grade F.

A plain-language history of this feed, newest first.

  • 2026-09-13 Feed expired.
  • 2026-09-12 Score fell 14 points, correctness fell 32 points.
  • 2026-09-01 Feed entered the expiry window (3 days of service left).

Everything we checked

15 findings, ordered by severity.

Show every finding
  • Error91 instances

    Block trips with overlapping stop times (flagged by the MobilityData validator).

    See the linked rule for what this affects.

    Fix: Review the rule documentation for 'block_trips_with_overlapping_stop_times' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed. (Varies.)

    Finding code: block_trips_with_overlapping_stop_times · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

  • Error2 instances

    Point near origin (flagged by the MobilityData validator).

    See the linked rule for what this affects.

    Fix: Review the rule documentation for 'point_near_origin' at https://gtfs-validator.mobilitydata.org/rules.html and check the flagged rows in your feed. (Varies.)

    Finding code: point_near_origin · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

  • Error1 instance

    Service data ended 0 day(s) ago.

    When the calendar runs out, trip planners stop showing this agency even though the buses are still running. Riders are told the service does not exist.

    Fix: Re-export the feed with a calendar that reaches further out. Set feed_end_date in feed_info.txt past your next service change. (Usually one export setting; export on a schedule so it never lapses again.)

    Finding code: scorecard_feed_expired · Read the fix guide for scorecard_feed_expired · See GTFS Best Practices (opens GTFS Best Practices on an external site)

  • Warning4695 instances

    4695 of 4695 trips don't say whether the vehicle is wheelchair accessible.

    Even with accessible stops, riders need to know the bus itself can take them.

    Fix: Set wheelchair_accessible on every trip. If every vehicle is accessible, this may be one default; otherwise use the value for each trip. (A default or per-trip field in your export.)

    Finding code: scorecard_wheelchair_accessible_unknown · Read the fix guide for scorecard_wheelchair_accessible_unknown · See GTFS Schedule reference (opens the GTFS Schedule reference on an external site)

  • Warning1647 instances

    1647 of 1647 stops don't say whether a wheelchair user can board there.

    Riders who use wheelchairs can't plan a trip when accessibility is marked 'unknown'; apps show no information at all.

    Fix: Set wheelchair_boarding to 1 (accessible) or 2 (not accessible) for every stop. A field survey can start with the busiest stops. (A column in stops.txt; your scheduling software likely has it.)

    Finding code: scorecard_wheelchair_boarding_unknown · Read the fix guide for scorecard_wheelchair_boarding_unknown · See GTFS Schedule reference (opens the GTFS Schedule reference on an external site)

  • Warning97 instances

    Some stops sit far from the route line they belong to.

    Trip planners may draw the bus route through the wrong streets or point riders to the wrong corner.

    Fix: Check the flagged stops' coordinates and the route shape in your scheduling software; re-snap whichever is misplaced. (A few minutes per flagged stop.)

    Finding code: stop_too_far_from_shape · Read the fix guide for stop_too_far_from_shape · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

  • Warning33 instances

    Some service calendars have no days of the week switched on.

    Trips tied to these calendars never run; they are dead data that can mask real schedule problems.

    Fix: Delete the empty calendars or set their service days. (A few minutes in your scheduling software.)

    Finding code: service_has_no_active_day_of_the_week · Read the fix guide for service_has_no_active_day_of_the_week · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

  • Warning4 instances

    Some stops exist in the feed but no trip ever stops at them.

    Riders may walk to a stop where no bus is scheduled to arrive.

    Fix: Remove retired stops from the export, or add them back to the trips that should serve them. (A review pass in your scheduling software.)

    Finding code: stop_without_stop_time · Read the fix guide for stop_without_stop_time · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

  • Warning1 instance

    Some scheduled trips move faster between stops than a bus can.

    Usually a typo'd stop time; riders get arrival times no bus can meet.

    Fix: Check the flagged stop times for transposed minutes. (A few minutes per flagged trip.)

    Finding code: fast_travel_between_consecutive_stops · Read the fix guide for fast_travel_between_consecutive_stops · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

  • Warning1 instance

    Between two distant stops, the times imply a speed no bus reaches.

    A rider gets a trip plan that cannot happen. Live systems then report delays that are not real.

    Fix: Check the two stop times for a wrong digit first. Then check whether a stop sits at the wrong coordinates, or a stop between them is missing. (Minutes per flagged trip once you open it.)

    Finding code: fast_travel_between_far_stops · Read the fix guide for fast_travel_between_far_stops · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

  • Warning1 instance

    A file GTFS asks for (usually feed_info.txt) is missing.

    feed_info.txt tells apps who publishes the feed and when it expires; without it nobody is warned before data goes stale.

    Fix: Add feed_info.txt with publisher name, URL, language, and feed_start_date/feed_end_date. (One small file, set once in export settings.)

    Finding code: missing_recommended_file · Read the fix guide for missing_recommended_file · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

  • Warning1 instance

    Many of the feed's trips don't run at all in the next 7 days.

    It usually means old service periods are still in the export, making the feed bigger and harder to check.

    Fix: Trim past service periods the next time you export. (One setting in most export tools.)

    Finding code: trip_coverage_not_active_for_next7_days · Read the fix guide for trip_coverage_not_active_for_next7_days · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

  • Warning1 instance

    feed_info.txt is missing its start/end dates (the file itself is absent)

    Apps and this scorecard can't warn anyone before the feed goes stale without stated validity dates.

    Fix: Add feed_info.txt with feed_start_date and feed_end_date to your export. (Two fields, set once in export settings.)

    Finding code: scorecard_missing_feed_info_dates · Read the fix guide for scorecard_missing_feed_info_dates · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

  • Warning1 instance

    The feed contains no fare information.

    Riders see 'fare unknown' in trip planners and can't budget their trip; visitors are most affected.

    Fix: Add fare_attributes.txt (or Fares v2 files) with your fare structure. If your service is fare-free, ask to have it marked fare-free instead. (A small file for most flat-fare systems.)

    Finding code: scorecard_no_fare_data · Read the fix guide for scorecard_no_fare_data · See GTFS Best Practices (opens GTFS Best Practices on an external site)

  • Info1 instance

    feed_info.txt has no technical contact (feed_contact_email or feed_contact_url).

    App makers and state data programs have nobody to email when they spot a problem. Small errors then sit in the feed for months.

    Fix: Add feed_contact_email to feed_info.txt. (One field.)

    Finding code: scorecard_no_feed_contact · Read the fix guide for scorecard_no_feed_contact · See MobilityData GTFS Validator rules (opens the validator rules on an external site)

Conformance mark Not yet

This feed does not meet the conformance requirements yet. Here is what the mark needs: 2 validator errors to resolve. Service data expired 0 days ago. States wheelchair access on 0% of stops and 0% of trips; the mark needs 90% of each.

Valid Not yet
2 validator errors to resolve.
Current Not yet
Service data expired 0 days ago.
Accessible Not yet
States wheelchair access on 0% of stops and 0% of trips; the mark needs 90% of each.

In plain words: earn this mark when your feed passes validation, has not expired, and says whether nearly every stop and trip is wheelchair accessible.

A pass credential for a feed that is valid, current, and states wheelchair access on nearly every stop and trip. Accessibility here measures what the feed publishes, not whether a stop is physically usable. How the conformance mark works.

Can riders use it?

Checks beyond structural validation: places where the feed is valid but a rider still could not travel.

  • 4 of 1647 boardable stops are never served by any trip. Riders see these stops in apps and on the map but can never catch anything there, which erodes trust in the data. Remove stops no route serves, or add the trips that should call at them.

These do not change the grade. They catch trips with no rideable leg and stops no trip serves, the kind of gap a trip planner trips over.

Below the Google and Apple Maps four-week coverage bar. This feed's last day of service has passed, so Google and Apple Maps will stop showing your agency. Re-export with a calendar that covers at least the next four weeks. The feed also carries 93 validator errors, the other thing Maps checks at onboarding; the findings below name each fix.

How this agency maps to the standards

The scorecard is a data-quality lens, not a compliance determination. Its universal references describe good GTFS and useful rider information. Useful references here are GTFS Schedule Best Practices, GTFS-Realtime Best Practices, MobilityData grading scheme, Google Transit publication guidance. Read the full standards crosswalk.

Correctness 30 / 100
GTFS Schedule best practices, checked by the MobilityData validator. MobilityData grading covers stop locations, route names, and colors. Google Transit requires a feed to pass validation for publication.
Freshness 0 / 100
GTFS Schedule best practices call for a dataset that stays current. An expired calendar can remove service from Google Transit and other rider trip planners.
Rider experience 38 / 100
GTFS Best Practices for rider-facing fields. MobilityData grading covers stop names and headsigns.
Realtime quality Not yet published
GTFS-Realtime best practices: a stable URL, high uptime, and frequent updates.

Part of the United Kingdom portfolio: the same scorecards for every feed we track in that group, on one free page.

Show your grade

Put a badge on your agency site or feed README. It updates after each completed scoring check and links back to this scorecard.

Cardiff Bus (Bws Caerdydd) GTFS data quality grade: F

Prefer a shields.io style? Point a dynamic endpoint badge at the published badge.json.

Cite this record

This page updates on every check. The record below does not: it is the dated file this grade came from, published at https://gtfsscorecard.org/data/artifacts/cardiff-bus/2026-09-13.json and never overwritten, pinning the grade, category scores, rubric version, validator version, reader archive profile, and the scored feed's sha256 as they stood on 2026-09-13. Use it in a board packet, a regulatory filing, or a research citation instead of linking the live page, whose content will differ on your next visit.

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