Route 133 (also known as the Hightstown Bypass) is a short state freeway located entirely in East Windsor Township, Mercer County, New Jersey in the United States. The route runs as a 4.42-mile-long (7.11 km) four-lane bypass of Hightstown from County Route 571 (CR 571) at Windsor Center Drive to the New Jersey Turnpike / Interstate 95 (I-95) at exit 8. Originally, Route 133 did not have any direct connections to any other limited access roads until a new Turnpike interchange opened in January 2013.