U.S. Federal Route 1 is a north-south highway in Eastern County. It runs from the Middlesex/Union County Line, near Rahway, to the Essex/Union County Line, at Newark. U.S. Rt. 9 passes through the following towns in Union County. Rahway Linden Elizabeth U.S. Rt. 9 is multi-plexed in Bergen County. U.S. Rt. 1, throughout Union County. U.S. Rt. 9 intersects the following highways in Union County. Interstate 95, at Elizabeth. Interstate 278, at Elizabeth. New Jersey Turnpike, at Elizabeth. New Jersey State Route 439, at Elizabeth. New Jersey State Route 81, at Elizabeth.