SR 709 begins at the point where CT 63 turns off of South Main Street in Naugatuck. South Main Street passes under the Ansonia-Derby Expressway (CT 8). There is a northbound entrance on the right before the overpass.

Photos taken August 2017.

South Main Street runs north through Naugatuck.

Photos taken August 2017.

South Main Street ends here at a traffic light at Maple Street. A ramp to the Ansonia-Derby Expressway (CT 8) northbound is straight ahead.

Photos taken August 2017.