Reference

Input/output
read_gtfs()	Read GTFS files
write_gtfs()	Write GTFS files
Manipulation
convert_sf_to_shapes()	Convert a simple feature object into a shapes table
convert_shapes_to_sf()	Convert shapes table to simple feature object
convert_stops_to_sf()	Convert stops table to simple feature object
convert_time_to_seconds()	Convert time fields to seconds after midnight
frequencies_to_stop_times()	Convert frequencies to stop times
merge_gtfs()	Merge GTFS files
remove_duplicates()	Remove duplicated entries
set_trip_speed()	Set trip average speed
Analysis
get_children_stops()	Get children stops recursively
get_parent_station()	Get parent stations recursively
get_stop_times_patterns()	Get stop times patterns
get_trip_duration()	Get trip duration
get_trip_geometry()	Get trip geometry
get_trip_length()	Get trip length
get_trip_segment_duration()	Get trip segments' duration
get_trip_speed()	Get trip speed
Validation
download_validator()	Download MobilityData's GTFS validator
validate_gtfs()	Validate GTFS feed
Filters
filter_by_agency_id()	Filter GTFS object by agency_id
filter_by_route_id()	Filter GTFS object by route_id
filter_by_route_type()	Filter GTFS object by route_type (transport mode)
filter_by_service_id()	Filter GTFS object by service_id
filter_by_sf()	Filter a GTFS object using a simple features object (deprecated)
filter_by_shape_id()	Filter GTFS object by shape_id
filter_by_spatial_extent()	Filter a GTFS object using a spatial extent
filter_by_stop_id()	Filter GTFS object by stop_id
filter_by_time_of_day()	Filter GTFS object by time of day
filter_by_trip_id()	Filter GTFS object by trip_id
filter_by_weekday()	Filter GTFS object by weekday
Interoperability between GTFS packages
as_dt_gtfs()	Coerce lists and GTFS objects from other packages into gtfstools-compatible GTFS objects