The Merritt Parkway is a Depression-era public works project, completed in 1940 at a cost of $21 million. It runs approximately 38 miles long from the Housatonic River in Stratford, Connecticut to the New York state line in Greenwich. No commercial vehicles are allowed on the parkway, which hosts some 70 uniquely-styled bridges crossing its length. It was placed on the National Register of Historic Places in 1991.