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Estimate a four step model for later use, based on 2017 NHTS data and PSRC household survey data (for distribution functions).

estimate.Rd

Load the NHTS data with load_nhts(), and if desired filter the households table to just the households you want to use in estimation. Julia must already be installed. If you get an error that Julia is not found, you need to set the JULIA_HOME environment variable to the directory containing the Julia executable.

Usage

estimate(
  nhts,
  osm,
  state,
  county,
  year,
  highway_types = c("motorway", "motorway_link", "trunk", "trunk_link", "primary",
    "primary_link")
)

Arguments

nhts

Path to 2017 NHTS CSV files

osm

Path to OSM .pbf file

state

State to estimate model for

county

County (or vector of counties) to estimate model for

year

Year of ACS and LODES data to use (if you get 404 errors, you are probably trying to use a year that LODES is not available for)

highway_types

OSM highway= tags to include in network, default "motorway", "motorway_link", "trunk", "trunk_link", "primary", "primary_link"