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December 2022
Transit Joint Powers Authority for Merced County

Monthly GTFS Quality Report
Transit Joint Powers Authority for Merced County  ·  December 2022

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

08-13-2028
Feed End Date
0
Days With No Service
15
Routes
361
Stops
​
Has RT Feed
This feed includes GTFS-Realtime (GTFS-RT). Realtime data contributes to a better rider experience by letting riders know exactly when their bus or train is coming, as well as detour and trip cancellation info. It also enables Cal-ITP to support transit agencies with analyses such as our California Transit Speed Maps, viewable by clicking the button above. Certain feeds may include RT data but not have a speed map available. To generate a speed map, we require GTFS-RT Vehicle Positions data that matches the rest of the GTFS feed. Additionally, we don't currently generate speed maps for rail service. Please contact us at [email protected] with any questions about GTFS-RT data or suggestions for analysis products.

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? 2022-12-04 2022-12-18
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
unknown_file A file is unknown. INFO
unknown_column A column is unknown. INFO
foreign_key_violation A foreign key references the primary key of another file. A foreign key violation means that the foreign key referenced from a given row (the child file) cannot be found in the corresponding file (the parent file). The Foreign keys are defined in the specification under "Type" for each file. ERROR
duplicate_key The values of the given key and rows are duplicates. ERROR
block_trips_with_overlapping_stop_times Trips with the same block id have overlapping stop times. ERROR
leading_or_trailing_whitespaces The value in CSV file has leading or trailing whitespaces. WARNING
route_short_name_too_long Short name of a route is too long (more than 12 characters). WARNING
fast_travel_between_far_stops A transit vehicle moves too fast between far consecutive stops (more than in 10 km apart). WARNING
stop_without_stop_time A stop in stops.txt is not referenced by any stop_times.stop_id, so it is not used by any trip. WARNING
fast_travel_between_consecutive_stops A transit vehicle moves too fast between two consecutive stops. The speed threshold depends on route type. WARNING
stop_too_far_from_shape Per GTFS Best Practices, route alignments (in shapes.txt) should be within 100 meters of stop locations which a trip serves. WARNING
stops_match_shape_out_of_order Two stop entries in stop_times.txt are different than their arrival-departure order as defined by the shape in the shapes.txt file. WARNING
stop_time_timepoint_without_times Any records with stop_times.timepoint set to 1 must define a value for stop_times.arrival_time and stop_times.departure_time fields. ERROR
stop_time_with_arrival_before_previous_departure_time For a given trip_id, the arrival_time of (n+1)-th stoptime in sequence must not precede the departure_time of n-th stoptime in sequence in stop_times.txt. ERROR
invalid_currency_amount A currency amount field has a value that does not match the format (e.g. expected number of decimal places) of its corresponding currency code field. The number of decimal places is specified by ISO 4217. ERROR
stop_without_zone_id If fare_rules.txt is provided, and fare_rules.txt uses at least one column among origin_id, destination_id, and contains_id, then all stops and platforms (location_type = 0) must have stops.zone_id assigned. ERROR
decreasing_or_equal_stop_time_distance When sorted by stop_times.stop_sequence, two consecutive entries in stop_times.txt should have increasing distance, based on the field shape_dist_traveled. If the values are equal, this is considered as an error. ERROR