gis_travel_time_master version 7/25/2019 gis_travel_time_master.zip
Vector road layers for CA, OR, WA, ID, MT, WY, NV, CO, UT state_road_vectors.zip
Raster road layers for CA, OR, WA, ID, MT, WY, NV, CO, UT in multiple resolutions roads_secsperkm_rasters_9states.zip
HaulTime R Script, courtesy of Demetrios Gatziolis, for processing raster road data to obtain travel times for BioSum HaulTime1.02.R
imitate_near.R Script, courtesy of Demetrios Gatziolis, for calculating yarding distance from plot points to a raster road network imitate_near.R
Consult chapter 3 of the BioSum Users Guide for details on how these layers and scripts can be used