The Trenton Freeway, a freeway through the city of Trenton, was first planned in 1950 to provide a bypass of Trenton and a connection to the new Trenton–Morrisville Toll Bridge. This freeway opened in December 1952 and became part of both US 1 and Route 26. In the 1953 New Jersey state highway renumbering that followed a month later, all the state highways running concurrent with US 1 were removed. In addition, US 1/9 Truck was designated as a bypass of the Pulaski Skyway (replacing Route 25T) and US 1/9 Business (now Route 139) was designated on the former Route 25 between the Tonnele Circle and the Holland Tunnel. Also, after the US 1 designation was moved to the Trenton Freeway, the former route through Trenton would become US 1 Alternate.