AMP: 79 Location: Boston Post Rd and Old Boston Post Rd, Old Saybrook Shortly after CT 166, we’ll approach CT 154. AMP: 79 Location: Boston Post Rd and Old Boston Post Rd, Old Saybrook CT 154 forms a sort of business loop for US 1 through Old Saybrook. Turn right for CT 154 north, which … Continue reading U.S. Route 1, CT 166 to CT 154