allocate_faf4_truckloads: Allocate flows from FAF regions to traffic analysis zones

In rickdonnelly/pcvmodr: Portable version of Oregon TLUMIP Commercial Vehicle (CV) model

Description

Allocate flows from FAF regions to traffic analysis zones

Usage

allocate_faf4_truckloads(faf_truck_flows, internal_regions,
  zonal_attractions, zonal_equivalencies)

Arguments

faf_truck_flows	Data frame containing truck flows between domestic FAF regions
internal_regions	List of FAF regions included within the modeled area
zonal_attractions	Data frame containing number of attractions by truck type by traffic analysis zone
zonal_equivalencies	Data frame containing the mapping from FAF regions to traffic analysis zones

Details

This function maps the domestic FAF regions coded in their regional flow database to traffic analysis zone (TAZ) equivalents. This can be done on a one-to-one basis in 'zonal_equivalncies' when there is one and only one TAZ associated with a given FAF region. However, the FAF regions within the interior of the modeled area, defined in 'internal_regions', should be coded as missing values. They should be coded as 'zonal_attractions' instead, where several TAZs can be defined for each internal FAF region. The resulting data frame includes all of the fields included in the input 'faf_truck_flows' data frame with origin and destination fields added.

Examples

exports <- allocate_faf4_truckloads(daily_trucks, 160, zonal_attractions,
  zonal_equivalencies)
exports <- allocate_faf4_truckloads(daily_trucks, c(411, 419, 532),
  zonal_attractions, zonal_equivalencies)

rickdonnelly/pcvmodr documentation built on May 14, 2019, 8:17 a.m.