It then descends once again into Cheshire, where it joins Route 70 for a 3.1 mile concurrency.

The road narrows to 2 lanes as it passes through Yalesville where it intersects Route 150.

Route 68 becomes a 4-lane undivided, partially access controlled road for the next 2.3 miles to its junction with I-91 at Exit 15.

After overpassing I-91 and passing a couple of business parks, Route 68 becomes a 2 lane road once again.

[1] The road connecting Naugatuck and Cheshire was designated in 1922 as State Highway 325.