Intended to be used by vehicles moving toward the north; of roads and parts of roads; as, The northbound lane was blocked by an overturned tractor-trailer.
... sorry to have you go, but I reckon you're justified. There is a way to board the northbound train without going to town, and if nothing else happens we'll make the eastbound express. That will take you out of the state ... — They of the High Trails • Hamlin Garland
... There was northbound travel at thirty-five, and northward Harkness would go, but he shot straight up. At forty thousand he motioned the master-pilot to ... — Astounding Stories, May, 1931 • Various