get_speeds: Calculate Speeds for GTFS Routes and Trips

In GTFSwizard: Exploring and Manipulating 'GTFS' Files

Calculate Speeds for GTFS Routes and Trips

Description

'get_speeds' calculates the average speed of trips and routes within a 'wizardgtfs' object. It uses distance and duration to provide speed outputs based on the specified 'method'.

Usage

get_speeds(gtfs, method = "by.route", trips = "all")

Arguments

gtfs	A GTFS object, ideally of class 'wizardgtfs'. If the 'shapes' table is missing, it will be created automatically using 'get_shapes()'.
method	A character string specifying the calculation method. Options include: "by.route" Calculates the average speed for each route based on average distance and duration. "by.trip" Calculates the average speed for each trip based on total distance and duration. "detailed" Calculates the speed for each segment between stops within a trip.
trips	A character vector of trip IDs to consider. When set to 'all', includes all trips.

Details

- This function calls specific sub-functions based on the selected 'method':

'by.route'

Calculates average speed across each route.

'by.trip'

Calculates average speed across each trip.

'detailed'

Calculates speeds between consecutive stops within each trip.

- If an invalid 'method' is specified, the function defaults to '"by.route"' and provides a warning.

Value

A data frame containing speed calculations, depending on the specified method:

If 'method = "by.route"'

Returns a data frame with columns: 'route_id', 'trips', 'average.speed', 'service_pattern', and 'pattern_frequency'.

If 'method = "by.trip"'

Returns a data frame with columns: 'route_id', 'trip_id', 'average.speed', 'service_pattern', and 'pattern_frequency'.

If 'method = "detailed"'

Returns a data frame with columns: 'route_id', 'trip_id', 'hour', 'from_stop_id', 'to_stop_id', 'speed', 'service_pattern', and 'pattern_frequency'.

See Also

[GTFSwizard::get_distances()], [GTFSwizard::get_durations()], [GTFSwizard::get_shapes()]

Examples

# Calculate average route speeds
speeds_by_route <- get_speeds(gtfs = for_rail_gtfs, method = "by.route", trips = 'all')

# Calculate trip speeds
speeds_by_trip <- get_speeds(gtfs = for_rail_gtfs, method = "by.trip", trips = 'all')


# Calculate detailed speeds between stops
detailed_speeds <- get_speeds(gtfs = for_rail_gtfs, method = "detailed", trips = 'all')

GTFSwizard documentation built on April 4, 2025, 4:10 a.m.