Cal-ITP

Monthly GTFS Quality Report
Norwalk Transit System  ·  December 2021

This is a monthly report, generated by the California Integrated Travel Project (Cal-ITP), summarizing issues discovered by MobilityData’s GTFS Validator. This report is available for viewing by the general public to support continuous improvement of GTFS data and the experience of transit passengers.


Current GTFS Feed Info

12-31-2021
Feed End Date
0
Days With No Service
17
Routes
259
Stops

About the December Daily Service Level Charts

  • These charts show the total hours of transit service described by the active feed for each day.
  • Since service levels often vary by the day of the week, it is split into three charts for weekdays, Saturdays, and Sundays.
  • Flat lines indicate consistent levels of service throughout the month.
  • Short drops may indicate temporary reduced service, such as for holidays, gaps in feed publishing, or potential inaccuracies.
  • Please reach out to our help desk at [email protected] with any questions.

Service hours per weekday in the active feed

Service hours per Saturday in the active feed

Service hours per Sunday in the active feed


About the December Identifier Change Charts

  • These charts show the percentage of stop and route IDs that have changed since the previous month.
  • Stop and route IDs are important identifiers for GTFS feed consumers to correctly parse feeds.
  • It is a GTFS Best Practice to keep these consistent between feed versions whenever possible.
  • More than 5% being new or dropped is a cause for attention, especially if there hasn't been a major service or route change.
  • Please reach out to our help desk at [email protected] with any questions.

Changes from December 01 to December 31


Consistency with the California GTFS Minimum Guidelines

Do the following files/fields exist? 2021-12-05 2021-12-19
Visual display shapes.txt
Navigation levels.txt
pathways.txt
Fares fare_leg_rules.txt
fare_rules.txt
Technical contacts feed_info.txt
Validation errors observed
Error Name Error Description Severity
decreasing_or_equal_shape_distance Two consecutive points in shapes.txt should have increasing values for shape_dist_traveled. If the values are equal, this is considered as an error. ERROR
feed_expiration_date At any time, the published GTFS dataset should be valid for at least the next 7 days, and ideally for as long as the operator is confident that the schedule will continue to be operated. If possible, the GTFS dataset should cover at least the next 30 days of service. WARNING
route_short_and_long_name_equal Short and long name should not be identical. WARNING
route_short_name_too_long Short name of a route is too long (more than 12 characters). Note that major trip planning applications start truncating short names after seven characters. WARNING
same_name_and_description_for_route The GTFS spec requires that a route_description is distinct from both the route short and long names. ERROR
stop_too_far_from_trip_shape Per GTFS Best Practices, route alignments (in shapes.txt) should be within 100 meters of stop locations which a trip serves. WARNING
too_fast_travel As implemented in the original Google Python GTFS validator, the calculated speed between stops should not be greater than 150 km/h (42 m/s SI or 93 mph). WARNING