New Jersey's per capita gross state product in 2008 was $54,699, second in the U.S. and above the national per capita gross domestic product of $46,588. Its per capita income was the third highest in the nation with $51,358. In 2013, the state had the second-largest number of millionaires per capita in the United States (ratio of 7.49%), according to a study by Phoenix Marketing International. It is ranked 2nd in the nation by the number of places with per capita incomes above national average with 76.4%. Nine of New Jersey's counties are in the wealthiest 100 of the country.
The New Jersey Turnpike is one of the most prominent and heavily trafficked roadways in the United States. This toll road carries Interstate 95 traffic between Delaware and New York, and the East Coast in general. Commonly referred to as simply "the Turnpike," it is known for its numerous rest areas named after prominent New Jerseyans as diverse as inventor Thomas Edison; United States Secretary of the Treasury Alexander Hamilton; United States Presidents Grover Cleveland and Woodrow Wilson; writers James Fenimore Cooper, Joyce Kilmer, and Walt Whitman; patriot Molly Pitcher; Red Cross founder Clara Barton; and football coach Vince Lombardi.
The Garden State Parkway, or simply "the Parkway," carries relatively more in-state traffic than interstate traffic and runs from the town of Montvale along New Jersey's northern border to its southernmost tip at Cape May for 172.4 miles (277.5 km). It is the trunk that connects the New York metropolitan area to the Jersey Shore and is consistently one of the safest roads in the nation. With a total of 15 travel and 6 shoulder lanes, the Driscoll Bridge on the Parkway, spanning the Raritan River in Middlesex County, is the widest motor vehicle bridge in the world by number of lanes as well as one of the busiest.
New Jersey is connected to New York City via various bridges and tunnels. The double-decked George Washington Bridge carries the heaviest load of motor vehicle traffic of any bridge in the world, at 102 million vehicles per year, over fourteen lanes, from Fort Lee, New Jersey in Bergen County across the Hudson River to the Trans-Manhattan Expressway in the Washington Heights neighborhood of Upper Manhattan in New York City; Interstate 95 and U.S. Route 1/9 cross the Hudson River via the "GWB", while U.S. Route 46, which lies entirely within New Jersey, ends halfway across the bridge at the state border with New York. The Lincoln Tunnel connects to Midtown Manhattan carrying New Jersey State Route 495 and the Holland Tunnel connects to Lower Manhattan carrying Interstate 78. New Jersey is also connected to Staten Island by three bridges from south to north: the Outerbridge Crossing, Goethals Bridge, and Bayonne Bridge.
Other expressways in New Jersey include the Atlantic City Expressway, the Palisades Interstate Parkway, Interstate 76, Interstate 78, Interstate 80, Interstate 95, Interstate 195, Interstate 278, Interstate 280, Interstate 287, Interstate 295, and Interstate 676. Other major roadways include U.S. 1, New Jersey Route 4, U.S. 9, New Jersey Route 10, and New Jersey Route 17.
New Jersey has interstate compacts with all three of its neighboring states. The Port Authority of New York and New Jersey, the Delaware River Port Authority (with Pennsylvania), and the Delaware River and Bay Authority (with Delaware) operate most of the major transportation routes into and out of New Jersey. Bridge tolls are collected in one direction only it is free to cross into New Jersey, but motorists must pay when exiting the state. Exceptions to this are the Dingman's Ferry Bridge and the Delaware River Turnpike Toll Bridge where tolls are charged both ways. The Washington Crossing and Scudders Falls (on I-95) bridges near Trenton, as well as Trenton's Calhoun Street and Bridge Street ("Trenton Makes") bridges, are toll-free. In addition, Riverton-Belvidere Bridge, Northampton Street Bridge, Riegelsville Bridge, and Upper Black Eddy-Milford Bridge are free Delaware River bridges into and out of NJ.
New Jersey became the only U.S. state where all fuel dispensing stations are required to sell full-service gasoline to customers at all times, after Oregon's introduction of restricted self-service gasoline availability took effect in 2016. It is unlawful for a customer to serve oneself gasoline in New Jersey.