Highway 42 runs northwest from where Highway 24 crosses the BNSF Railway's Northern Transcon,  a route operated by what Railway?
Montana Highway 42 Montana Highway 42 (MT 42) is a short, 2.9 mi state highway in the U.S. state of Montana, connecting Montana Highway 24 with downtown Glasgow. Formerly Highway 24W, Highway 42 (its route number a reversal of "24") runs northwest from where Highway 24 crosses the BNSF Railway's Northern Transcon, staying parallel to the tracks until it turns right in Glasgow's downtown and dives under the railroad to meet with and terminate at U.S. Route 2.
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.