Monitor the data quality in realtime feed

The Transit partner dashboard allows you to monitor the data quality of your Realtime feeds over time. Reports are generated daily and cover feed issues for the previous 8 days. Each report covers all realtime feeds submitted for a given Static feed.

Realtime Feeds button

Access the Realtime Feed Reports section for each of your live transit feeds by clicking the Realtime Feeds button on the Transit partner dashboard homepage.

Realtime feed reports

You can access realtime feed reports using your partner dashboard access rights.

View feed issues

To access a detailed report for each of your realtime feeds, click 'Feed Issues' for the feed in question.

Feed issues

Feed Issue Overview

The realtime feed report includes an overview of the feed issues observed over the previous 8 days.

Feed Issue Summary

Your realtime feed report shows a summary of all observed issues. The summary for each issue includes:

  • Severity: Categorization of data quality issues

  • Last seen: Date and time when the issue was last observed

  • Total quantity: The issue’s total number of instances over the past 8 days

  • Max. quantity: The maximum number of occurrences per feed update over the past 8 days

Data quality issues under Severity are categorized as:

  • ERROR: Error prevents the feed from being processed, and the entire feed version has been discarded

  • WARN: The error is recoverable, i.e. the data is not correct, but Google discarded and/or adjusted the affected entities and moved on

  • INFO: The feed has been processed, but you should double check the data.

Feed issue summary

Individual issue details

In the feed issue summary view, click an individual issue to view specifics about that issue. You’ll see a historical graph of the issue occurrence over the past 8 days, plus  details, including:

  • Severity: The issue’s severity categorization

  • Cause/effect: The cause of the issue and and its possible effects

  • Possible resolutions: Suggestions for potential solutions to the problem

  • First seen/last seen: First and last occurrence of the issue

  • Fetches affected: Percentage and number of fetches affected by the issue

  • Quantity: Total quantity of issue occurrences, average per feed and the problem’s maximum per-feed occurrences over the past 8 days

  • Example instances: A list of example instances of the issue

Details view


Under Example Instances, click the Expand Details button to review a snippet of the corresponding source data.

Source Data View

View trip updates feed coverage

To access a detailed coverage report for your Realtime trip updates feeds, click 'Coverage' for the feed in question. If you provide multiple trip update feeds for the same GTFS static feed, the report will deal with the cumulative coverage of all trip updates feeds matching that one GTFS static feed.

Feed issues

The report include metrics about the coverage observed over the past 7 days:

  • Realtime coverage by trips, over all routes: The number of trips for which in the given period we received realtime information, over the total number of trips in the corresponding GTFS feed.

  • Realtime coverage by trips, over routes with at least one realtime update: The average number of trips for which in the given period we received realtime information out of the total number of trips belonging to routes with at least one trip served by realtime updates.

  • Detailed route metrics: Shows routes with no coverage, with partial coverage, and with full coverage:
    route metrics

  • Coverage map: Visualizes coverage with different color coding for routes with no coverage, routes with partial coverage, and routes with full coverage.

Coverage map

  • Details and samples for each of the coverage categories:

Routes with no realtime coverage

Routes with partial realtime coverage

Routes with full realtime coverage


For routes with partial or no realtime coverage: Obtain a list of samples of missing trips by clicking on See missing trips for a given route.

Missing trip examples


For all routes, clicking on [GTFS] in the route_id column re-directs to the information about the corresponding static feed.


The Realtime Feeds feature displays only the 50 most recent historical reports.
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