United States ex rel. Arlington & F. Auto R. v. Elgen

This is a petition for mandamus. Appellant is a railroad corporation chartered under the Virginia laws and, though located wholly in Virginia, is nevertheless engaged in interstate commerce as a common carrier. It operates a line of railroad some twenty miles in length from the town of Fairfax to the town of Rosslyn, which is situate at the District of Columbia line near the Virginia end of the Key Bridge. *265Its operations are conducted by means oí “auto-railers”, motor cars capable of operation both on and off rails. The cars run on the rails except at the termini, at which points they leave…