It lies between Interstate 95 and New Hampshire Route 1A .
In the U.S. state of New Hampshire , U.S. Route 1 ( US 1 ) is a north -- south state highway through Hampton and Portsmouth .
U.S. Route 1 lies between Interstate 95 and New Hampshire Route 1A .
In the U.S. state of New Hampshire , U.S. Route 1 ( US 1 ) is a north -- south state highway through Hampton and Portsmouth .