Queen Anne by 1921. Construction of the remainder of the highway to Cordova began in 1925 and was completed in 1929. The Cordova–Easton section was completed by 1933. In 1955, MD 309 assumed the length of MD 303 north to near Centreville. A present alignment of MD 309 opened between Cordova and Queen Anne in 1960; the old highway became the second edition of MD 303 in 1961. The southernmost portion of MD 309 was moved from Cordova Road to Black Dog Alley in 1995. Junction list Auxiliary routes MD 309A is the designation for Service Road A, a road that runs from MD 309 west to a dead end south of the MD 404 intersection in Queen Anne. The route was constructed in 2016. MD 309B is the designation for Entrance B, a short service road off of MD 303 between MD 309 and MD 404 in Queen Anne. The route was constructed in 2016. See also References External links MDRoads: MD 309 309 Maryland Route 309 Maryland Route 309