U.S. Route 1 (
US 1) is a major north–south
U.S. Highway that serves the
East Coast of the United States. It runs 2,369 miles (3,813 km), from
Fort Kent,
Maine, at the
Canadian border, south to
Key West,
Florida, making it the longest north-south road in the United States. US 1 is generally paralleled by
Interstate 95, though the former is significantly farther west (inland) between
Jacksonville, Florida, and
Petersburg, Virginia. The highway connects most of the major cities of the east coast, including
Miami,
Washington, D.C.,
Baltimore,
Philadelphia,
New York City, and
Boston, passing from the
Southeastern United States to
New England.