clean_incomplete_trips
                        Filter out entire trips which do not meet
                        distance or duration requirements
clean_jumps             Apply median filters to detect large jumps
                        (i.e., outliers) in trajectories.
clean_overlapping_subtrips
                        Remove trips with multiple operators or
                        vehicles assigned to the same trip ID
export_animation        Save an animation at a desired quality
filter_by_route         Filter GTFS to a desired route(s) and
                        direction(s)
get_gtfs_service_dates
                        Get a dataframe of all service dates and their
                        service IDs from a GTFS
get_gtfs_trajectory_fun
                        Fit continuous trajectory interpolating curves
                        from GTFS schedule data
get_linear_distances    Linearize latitude-longitude GPS points on a
                        provided route shape
get_shape_geometry      Get the geometry of a route shape
get_stop_distances      Get the distances of stops along routes
get_trajectory_fun      Fit continuous trajectory interpolating curves
                        from AVL data
get_trip_extremes       Get the distance and time range of each trip in
                        a trajectory object
group_trajectories      Group existing trajectory objects or split them
                        apart
lacmta_avl              LA Metro AVL Data
lacmta_gtfs             LA Metro GTFS
make_monotonic          Correct distance observations, and optionally
                        speeds, to be weakly or strictly monotonic
new_transittraj_data    Retrieve an object from a particular step of
                        'transittraj"s workflow
plot.avltrajectory_group
                        Quickly plot an AVL trajectory
plot_animated_line      Animate vehicle trajectory or AVL data
plot_interactive_gtfs   Generate a Leaflet viewer of GTFS routes and
                        stops
plot_trajectory         Plot vehicle trajectories or AVL data
predict.avltrajectory_group
                        Interpolate time or distance points using AVL
                        trajectories
print.avltrajectory_group
                        Print an AVL trajectory object
project_onto_route      Project points to linear distances along a
                        route
summary.avltrajectory_group
                        Summarize an AVL trajectory object
trim_trips              Remove observations occurring before a trip's
                        minimum distance, or after a trip's maximum
                        distance
validate_monotonicity   Check if AVL data satisfies assumptions of
                        monotonicity
validate_tides          Check if AVL data meets TIDES standards
