County Route 579

County Route 579 (CR 579) is a county highway in the U.S. state of New Jersey. The highway extends from John Fitch Parkway (Route 29) in Trenton to Route 173 in Greenwich Township. Route description CR 579 begins at an intersection with Route 29 in Trenton, Mercer County, heading north on two-lane undivided Sullivan Way. The road crosses under the Delaware and Raritan Canal and an abandoned railroad, making a turn to the northwest. The route passes between the Trenton Country Club to the southwest and the Trenton Psychiatric Hospital to the northeast as it enters Ewing Township. CR 579 enters and crosses CR 643, heading into wooded areas as it passes the Katzenbach School for the Deaf. The route passes under a railroad line that is part of CSX's Trenton Subdivision and SEPTA's West Trenton Line southwest of the West Trenton station that serves as the terminus of the SEPTA line, at which point it becomes Grand Avenue and passes through the residential community of West Trenton. CR 579 crosses CR 634, becoming Bear Tavern Road, and turns northwest as it passes near Trenton-Mercer Airport, intersecting CR 600. The route interchanges with Interstate 295 (I-295) and heads into wooded residential areas, intersecting CR 647 before joining CR 637 on Jacobs Creek Road. Here, the road enters forested areas and crosses the Jacobs Creek into Hopewell Township, heading north. CR 579 splits from CR 637 and continues northwest onto Bear Tavern Road, crossing the Jacobs Creek again and turning north into a mix of fields, woods, and homes. The route crosses CR 546 and continues through farmland and woodland with a few residences. The route becomes Harbourton-Rocktown Road and comes to a junction with CR 623 before passing through more forested areas and coming to the CR 518 intersection. A short distance later, CR 579 continues into West Amwell Township in Hunterdon County, continuing through more rural areas of farms, woods, and homes before intersecting Route 31. The two routes run concurrent to the northwest on the border between West Amwell Township to the west and East Amwell Township to the east, becoming a three-lane road with a center left-turn lane that crosses entirely into East Amwell Township before resuming along the border of East and West Amwell Townships. The road becomes a divided highway and crosses entirely into East Amwell Township again before it comes to an interchange with US 202, where Route 31 heads north along US 202.