Eight major north-south interstate corridors traverse the nation (interstates 5, 15, 25, 35, 55, 65, 75, 95), all of them supported by rail.East-west trade corridors are interstates 80, 90/94, 70, 40, and 10, along which European goods received on the East Coast and shipments from Asia that arrive in West Coast ports travel. Click 'enlarge' to see entire map.