AMP: 0 Location: Colman St and Jefferson Ave, New London No signage as SR 639 begins. SR 639 carries southbound US 1 traffic for a few blocks. AMP: 0 Location: Colman St and Lincoln Ave, New London Stay on SR 639 to connect to US 1 – though this is the official path of US … Continue reading Connecticut State Road 639, US-1 to US-1