AMP: 0 Location: Rainville Ave and CT 349, Groton No signage as SR 649 begins. 649 exists to serve the New London Airport. AMP: 0 Location: Rainville Ave and Poquonnock Rd, Groton .21 miles into SR 649, we’ll turn right onto Poquonnock Rd. AMP: 0 Location: Poquonnock Rd and Rainville Ave, Groton No signage after … Continue reading Connecticut State Road 649, CT 349 to US-1