AMP: 78 Location: I-95 and Boston Post Rd, Old Saybrook Immediately after US 1 joins I-95, we’ll approach the CT 9 freeway. AMP: 78 Location: I-95 and CT 9, Old Saybrook Exit for CT 9 north as I-95/US 1 north cross the Connecticut River. N to I-95/CT 156, S to CT 154 S to CT … Continue reading U.S. Route 1, I-95/SR 628 to CT 9