Route 91 is a spur state highway in Middlesex County, New Jersey. The route runs as a spur of U.S. Route 1 (US 1) along Jersey Avenue in North Brunswick Township to Van Dyke Avenue in the city of New Brunswick. At Van Dyke Avenue, Route 91 ends as a state route, and Jersey Avenue continues as County Route 693 (CR 693) to Route 27 in the center of New Brunswick. The mainline of Route 91 officially ends at the ramps to and from US 1 southbound (bound for Trenton) and Orchard Street; the connector constructed from US 1 northbound is designated as Route 91 Connector.