create_annual_faf_truckloads: Generate annual truckload equivalents using FAF3 Traffic...
In pbsag/swimctr: Oregon SWIM v2.5 Commercial Transport (CT) Model

Description Usage Arguments Details Examples

View source: R/create_annual_faf_truckloads.R

Generate annual truckload equivalents using FAF3 Traffic Analysis process

1 2	create_annual_faf_truckloads(faf_data, truck_allocation_factors, truck_equivalency_factors, empty_truck_factors, debug_trace = FALSE)

`faf_data`	Data frame containing reformatted FAF commodity flow database
`truck_allocation_factors`	Data frame containing factors that map commodity flows to different types of trucks
`truck_equivalency_factors`	Data frame containing factors that translate tons into truckload equivalents
`empty_truck_factors`	Data frame containing factors for calculating incidence of empty trucks, given the trade (domestic versus foreign) and truck type
`debug_trace`	Turns detailed tracing statements on or off (defaults to FALSE)

This function appends annual truckload equivalents to the FHWA Freight Analysis Framework (FAF) commodity flow forecast database. The process is based upon the FAF3 Traffic Analysis report developed by Battelle, which maps tonnage to truckload equivalents, including empty trucks. The function requires reformatted FAF data that replaces several numeric values with strings that are more intuitive and retains data only for the target year. The function also requires three tables from Chapter 3 of the FAF Traffic Analysis report, and then follows their methodology exactly (but without the errors in the report). The function returns an updated FAF database with truckload equivalents appended to each record.