the parsed GTFS CSV data
Required Time at which service changes or ends (HH:MM:SS, can exceed 24:00:00 if overnight).
Optional
exactOptional Whether this is frequency-based or schedule-based service.
Required Headway in seconds between departures from the same stop for this trip, during [start_time, end_time).
Required Time at which the first vehicle departs from the trip’s first stop with the specified headway (HH:MM:SS, can exceed 24:00:00 if overnight).
Required
Identifies the trip (trips.trip_id
) to which the specified headway of service applies.
Frequency
Optional Defines headway-based (or compressed schedule-based) service for specific trips. Each record references a single trip and indicates:
Primary Key: (
trip_id
,start_time
)