Interstate 78 in New Jersey

Interstate 78
I-78 highlighted in red
Route information
Maintained by NJDOT, DRJTBC, NJTA, and PANYNJ
Length:	67.83 mi (109.16 km)
Major junctions
West end:	I-78 at Pennsylvania border in Phillipsburg
	US 22 in Pohatcong Township Route 31 in Clinton I-287 in Bedminster Route 24 in Springfield G.S. Parkway in Union/Hillside US 1-9 in Newark I-95 / N.J. Turnpike in Newark Route 139 in Jersey City
East end:	I-78 at New York border in Jersey City
Location
Counties:	Warren, Hunterdon, Somerset, Union, Essex, Hudson
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future New Jersey State Highway Routes Interstate US State Scenic Byways ← Route 77 Route 79 → ← Route 10 Route 12 →

New Jersey State Highway Routes

Interstate 78 (I-78) is an east–west route stretching from Union Township, Lebanon County, Pennsylvania to New York City. In New Jersey, I-78 is called the Phillipsburg–Newark Expressway and the Newark Bay Extension of the New Jersey Turnpike. The highway runs for 67.83 miles (109.16 km) in the northern part of the state of New Jersey from the Interstate 78 Toll Bridge over the Delaware River at the Pennsylvania state line in Phillipsburg, Warren County east to the Holland Tunnel under the Hudson River at the New York state line in Jersey City, Hudson County. The Phillipsburg-Newark Expressway portion of I-78, formally called the Lightning Division Memorial Highway, runs from the Phillipsburg area east across rural areas of western New Jersey before entering suburban areas in Somerset County. The road crosses the Watchung Mountains, widening into a local-express lane configuration at Route 24 as it continues through urban areas to Newark. Here, I-78 intersects the mainline of the New Jersey Turnpike (I-95) and becomes the Newark Bay Extension, crossing the Newark Bay Bridge and continuing to Jersey City. The route, along with Route 139, follows a one-way pair of surface streets to the Holland Tunnel.