AMP: 0 Location: SR 630 and Preston Rd, Jewett City, Griswold No signage as SR 630 begins. 630 is a frontage road for I-395 north. AMP: 0 Location: SR 630 and Albemarie Dr, Jewett City, Griswold .36 miles later, we’ll approach CT 138 (and I-395 again). AMP: 0 Location: SR 630 and Voluntown Rd, Jewett … Continue reading Connecticut State Road 630, I-395/CT 164 to I-395/CT 138