Interstate 95 (I-95) is the main highway on the East Coast of the United States,[1] parallelling the Atlantic Ocean from Maine to Florida and serving some of the best-known cities in the country including Boston, Philadelphia, New York City, and Washington, D.C. It is one of the north-south routes of the Interstate Highway System, and replaced older U.S. Highways, mainly U.S. Route 1. The oldest sections of I-95, including a number of toll roads, predate the Interstate System; the route has yet to be completed in the Pennsylvania-New Jersey area.