AMP: 0 Location: Lake Hayward Rd and CT 11, Colchester SR 637 begins at the onramp to CT 11 south. AMP: 0 Location: Lake Hayward Rd and New London Rd, Colchester SR 637 exists to connect 11, 85, 354, and 2 all together on the south side of town. .3 miles into the route, we’ll … Continue reading Connecticut State Road 637, CT 11 to CT 85