Route 67 is a mostly two-lane surface road, with a short four-lane section in Southbury.

After crossing the Housatonic River into the center of town, Route 67 breaks away to the southeast.

In Seymour, it passes the western end of Route 313 before crossing the Naugatuck River.

[5] The Oxford Turnpike was chartered in May 1795 and was one of the two earliest private toll roads in Connecticut.

In 1922, the road from Woodbridge to Southbury (the old Oxford Turnpike) was designated as State Highway 147 and the road from Southbury to New Milford (via Roxbury and Bridgewater) was designated as State Highway 125.