 However, east of Windsor Street, instead of heading directly onto the Route 8 expressway, Route 73 continued to follow Watertown Avenue southeast to West Main Street then turned east along West Main Street to end at the intersection with Thomaston Avenue, which was the original alignment of Route 8.In the 1960s, there were plans to build a short expressway connector between Route 8 in Waterbury and the Route 63/US 6 junction in Watertown.As part of this plan, a partial interchange was built for Route 73, which opened in 1968.