AMP: 101 Location: S Frontage Rd and I-95, New London Just after the SR 636 interchange, we’ll merge onto I-95 north to head over the Thames River into Groton. In this same interchange, SR 623 exits on the north side of the highway from I-95/US 1 south and carries 1 south along the north frontage … Continue reading U.S. Route 1, SR 636 to I-95/CT 32/SR 623/SR 641