AMP: 98 Location: Bank St and Colman St, New London One block after SR 643, we’ll approach SR 639. You can’t turn left on SR 639 because it carries US 1 southbound. 1 north will turn left in a couple blocks and parallel it in a one way grid. N to CT 213, S to … Continue reading U.S. Route 1, SR 643 to SR 639