The base for the roads layer was developed by the BLM using BLM data, USFS data, USGS DLG and other sources and is what was referred to as the GTRN dataset. The road layer is comprised of the best available data. This means that when road linework is enhanced through the protection map process or through district or program mapping efforts that the enhanced linework will replace or be integrated with the statewide layer. This road layer has specific designations for Protection Map display.