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OptionalshapeSpecifies the shape of the vehicle travel path when the trip shape differs from the shape specified in (CSV) GTFS or to specify it in real-time when it's not provided by (CSV) GTFS, such as a vehicle that takes differing paths based on rider demand. See definition of trips.shape_id in (CSV) GTFS. If a shape is neither defined in (CSV) GTFS nor in real-time, the shape is considered unknown. This field can refer to a shape defined in the (CSV) GTFS in shapes.txt or a Shape in the (protobuf) real-time feed. The order of stops (stop sequences) for this trip must remain the same as (CSV) GTFS. Stops that are a part of the original trip but will no longer be made, such as when a detour occurs, should be marked as schedule_relationship=SKIPPED. NOTE: This field is still experimental, and subject to change. It may be formally adopted in the future.
OptionalstartService date on which the DUPLICATED trip will be run, in YYYYMMDD format. Required if schedule_relationship=DUPLICATED, otherwise this field must not be populated and will be ignored by consumers. NOTE: This field is still experimental, and subject to change. It may be formally adopted in the future.
OptionalstartDefines the departure start time of the trip when it’s duplicated. See definition of stop_times.departure_time in (CSV) GTFS. Scheduled arrival and departure times for the duplicated trip are calculated based on the offset between the original trip departure_time and this field. For example, if a GTFS trip has stop A with a departure_time of 10:00:00 and stop B with departure_time of 10:01:00, and this field is populated with the value of 10:30:00, stop B on the duplicated trip will have a scheduled departure_time of 10:31:00. Real-time prediction delay values are applied to this calculated schedule time to determine the predicted time. For example, if a departure delay of 30 is provided for stop B, then the predicted departure time is 10:31:30. Real-time prediction time values do not have any offset applied to them and indicate the predicted time as provided. For example, if a departure time representing 10:31:30 is provided for stop B, then the predicted departure time is 10:31:30. This field is required if schedule_relationship is DUPLICATED, otherwise this field must not be populated and will be ignored by consumers. NOTE: This field is still experimental, and subject to change. It may be formally adopted in the future.
OptionaltripDefines the identifier of a new trip that is a duplicate of an existing trip defined in (CSV) GTFS trips.txt but will start at a different service date and/or time (defined using the TripProperties.start_date and TripProperties.start_time fields). See definition of trips.trip_id in (CSV) GTFS. Its value must be different than the ones used in the (CSV) GTFS. Required if schedule_relationship=DUPLICATED, otherwise this field must not be populated and will be ignored by consumers. NOTE: This field is still experimental, and subject to change. It may be formally adopted in the future.
Defines updated properties of the trip, such as a new shape_id when there is a detour. Or defines the trip_id, start_date, and start_time of a DUPLICATED trip. NOTE: This message is still experimental, and subject to change. It may be formally adopted in the future.