State highway in Warren County, New Jersey, United States
Route 122 is a short, 2.42-mile-long (3.89 km) state highway in Warren County, New Jersey. The route runs from Warren County Route 678 and Pursel Street in Phillipsburg to an intersection with U.S. Route 22 (US 22) in Pohatcong Township. The route is a former alignment of US 22, designated in 1926, however, until 1993, the route was designated U.S. Route 22 Alternate. After 1993, the route was decommissioned and replaced by County Route 678 (CR 648) and Route 122.