Calculate matrix of pair-wise travel times between points using multiple modes of transport.

Calculate matrix of pair-wise travel times between points using multiple modes of transport.

Usage

m4ra_times_multi_mode(
  net_sc = NULL,
  gtfs = NULL,
  city_name = NULL,
  day = NULL,
  start_time_limits = NULL,
  initial_mode = "foot",
  final_mode = "foot",
  from = NULL,
  duration_max = NULL,
  fast = FALSE,
  n_closest = 10L,
  quiet = FALSE
)

Arguments

net_sc

Local file path to a silicate, "SC", format object containing network data used to generate weighted street networks.

gtfs

Local file path to a gtfsrouter object saved via saveRDS, containing GTFS (General Transit Feed Specification) data for network represented in net_sc. This .Rds object may include additional timetable or transfer information in addition to data represented in original zip-format data of provided GTFS feed.

city_name

Name of city used to name cached files.

day

As for the 'gtfs_traveltimes' function of gtfsrouter, the day for which the matrix is to be calculated.

start_time_limits

As for the 'gtfs_traveltimes' function of gtfsrouter, a vector of two values specifying the earliest and latest departure times from each station.

initial_mode

Initial mode of transport from origin points towards public transport stop.

final_mode

The mode of transport used for the final stage from GTFS stops to destination points.

from

List of OSM vertex IDs from which to calculate total multi-modal travel times. These must be vertices from the largest connected component of the contracted graph.

duration_max

If specified, only calculate times from each point to the nearest GTFS stops out to specified maximal duration in seconds. Values may be provided if overall travel times are only of interest out to some defined range or maximal value. Specifying values for this parameter can can considerably reduce calculation times.

fast

Values of TRUE generate potentially enormous matrices which may not fit in local memory. The default value of FALSE is generally safer, but calculation may take considerably longer.

n_closest

Final travel times to each destination point are calculated by tracing back times to this number of closest GTFS stops. Lower values will result in faster calculation times, yet with potentially inaccurate results.

quiet

If FALSE, display progress information on screen.

See also

Other main: m4ra_dists_n_pts(), m4ra_gtfs_traveltimes(), m4ra_times_single_mode()