Highway 42 runs northwest from where Highway 24 crosses the BNSF Railway's Northern Transcon,  a route operated by what Railway?
Northern Transcon The Northern Transcon, a route operated by the BNSF Railway, traverses the most northerly route of any railroad in the western United States. This route was originally part of the Chicago, Burlington and Quincy Railroad, Northern Pacific Railway, Great Northern Railway and Spokane, Portland and Seattle Railway systems, merged into the Burlington Northern Railroad system in 1970.
Wyoming Highway 24 Wyoming Highway 24 (WYO 24) is a 46.72 mi long Wyoming state highway known as the Bear Lodge Highway. The route passes through the northern portion of the Bear Lodge Mountains, part of the Black Hills National Forest. Highway 24 spans from U.S. Route 14 to the South Dakota state line, where it continues south as South Dakota Highway 34. The highway passes by Devils Tower National Monument.