; Columbia, South Carolina ; Raleigh, North Carolina ; Richmond, Virginia ; Washington, DC ; Baltimore, Maryland ; Philadelphia, Pennsylvania ; Newark, New Jersey ; New York, New York ; New Haven, Connecticut ; Providence, Rhode Island ; Boston, Massachusetts and Portland, Maine .   http://en.wikipedia.org/wiki/U.S._Route_1   Sources: http://en.wikipedia.org/wiki/U.S._Route_1 Sign in to report abuse