High Quality Content by WIKIPEDIA articles! Route 172 is a short state highway in New Brunswick, New Jersey, United States. The designation runs along the southernmost leg of George Street, which is county and city-maintained the rest of the way. Route 172 is 0.81 miles (1.30 km) long, serving as a connector from an interchange with New Jersey Route 18 to an intersection with County Route 527 and Middlesex County Route 672. The highway was assigned in the 1950s, when nearby Route 18 was realigned onto a new freeway over Burnet Street in New Brunswick. Route 172 underwent a major upgrade during the reconstruction of Route 18, including a roundabout at an intersection with Middlesex County Route 617, and a brand-new interchange with the local lanes of Route 18.