The East Coast has the most developed transportation infrastructure in America, thanks to its density, history, and the sheer number of people who need to move through its cities every day. Penn Station in New York handles millions of passengers — it's the busiest transportation hub in the Western Hemisphere. The Acela corridor from Boston to Washington, D.C. is the closest thing America has to European-style high-speed rail.

The Northeast's transit systems are the oldest and most extensive in the country. Boston's T was the first subway in America. New York's subway runs 24/7 with 472 stations. Philadelphia's SEPTA connects the city to a vast suburban network. Washington's Metro extends into Virginia and Maryland, serving the federal workforce. No other region in America has this density of rail transit, and it fundamentally shapes how people live and work.

The East Coast's bridges are legendary. The Brooklyn Bridge, opened in 1883, was a wonder of 19th-century engineering. The George Washington Bridge between New Jersey and New York is the world's busiest motor vehicle bridge. Further south, the Chesapeake Bay Bridge-Tunnel in Virginia is an engineering marvel that combines bridges, tunnels, and artificial islands across 17.6 miles of open water.

This quiz focuses on the transportation networks that keep the East Coast connected — from JFK Airport to the Port of Baltimore to the Blue Ridge Parkway. The region's transportation story is one of density, history, and the constant challenge of moving millions of people through some of the most congested corridors in America.