Per the US Forest Service, "the Motor Vehicle Use Map is a requirement of the Travel Management Rule and reflects travel management plan decisions. The MVUM displays National Forest System (NFS) roads, trails, and areas that are designated open to motor vehicle travel. The MVUM also displays allowed uses by vehicle class (highway-legal vehicles, vehicles less than or equal to 50 inches wide, and motorcycles), seasonal allowances and provides information on other travel rules and regulations. Routes (includes both roads and trails) not shown on a MVUM are not open to public motor vehicle travel. Routes designated for motor vehicle use may not always be signed on the ground but will be identified on the MVUM. It is the public's responsibility to reference the MVUM to determine which routes are designated for motor vehicle use. The MVUM may be updated annually to reflect new travel decisions and to correct mapping discrepancies. The MVUM is a black and white map with no topographic features. It is not a stand alone map and is best used in conjunction with a National Forest Visitor Map or other topographic map." For more frequently asked questions about MVUMs as they apply to the Arapaho and Roosevelt National Forests, please view this page.