County Route 583 is a county highway in the U.S. state of New Jersey. Its northern end is at an intersection with Route 27 in Princeton; its southern end is in a concurrency with U.S. Route 1 Business and U.S. Route 206 at an intersection with County Route 653 in Trenton.

Route 27 is a state highway in New Jersey, United States. It runs 38.53 mi (62.01 km) from U.S. Route 206 (US 206) in Princeton, Mercer County northeast to an interchange with Route 21 and Broad Street in Newark, Essex County. The route passes through many communities along the way, including New Brunswick, Highland Park, Edison, Metuchen, Rahway, and Elizabeth. Route 27 is a two- to four-lane undivided highway for most of its length, passing through a variety of urban and suburban environments. It intersects many roads along the way, including Route 18 in New Brunswick, Interstate 287 (I-287) in Edison, the Garden State Parkway in Woodbridge Township, Route 35 in Rahway, Route 28 in Elizabeth, and U.S. Route 22 in Newark. Route 27 crosses the Raritan River on the Albany Street Bridge, which connects Highland Park on the east with New Brunswick on the west.