Description: Source is from centerline mapped using Trimble GeoXH recording at +/- 1/2 meter precision. Alignment was later verified with data collected by U.S. Federal Highways as part of their infrastructure mapping efforts.Other adjustments as outlined in Data Quality - Process section. The source data conforms to National Mapping Accuracy Standards. For the park road within Denali NPP and the George Parks Highway, routes were delineated and dynamic segmentation was added. Much of the resource monitoring, maintenance, and visitor protection activities that occur on both routes use mile post locations as a geographic reference. Dynamic segmentation of these routes allows these events to be placed accurately along the line depicting the road.