The Oak Ridge National
Highway Network contains approximately 500,000 miles of roadway
US, Canada, and Mexico, including virtually all rural arterials and
urban principal arterials in the US. Geographic accuracy is generally
in the US, with geography mostly derived from USGS Digital Line Graphs
and digitization. It includes a large attribute set relevant to
routing. Coordinates are in decimal degrees, datum NAD27. This version
(hp80) was last updated January 2008. Changes from the initial version
Click on thumbnail images to view illustrations of features:
Reformat program RHA to convert native format to a variety of GIS system inputs.
Configuration file RHAshape.txt with instructions.
Program files RHAmain.for, RHAsubs.for, RHA.exe. download
Revised February, 2008 WebMaster ORNL Disclaimer