AMP: 0 Location: Spring Brook Rd and I-95, Old Saybrook SR 628 begins as the connection between I-95/US 1 south and US 1 as US 1 splits from I-95. AMP: 0 Location: Spring Brook Rd and Boston Post Rd, Old Saybrook Turn left for US 1 north back to I-95 north. Turn right for US … Continue reading Connecticut State Road 628, (within the I-95/US-1 interchange)