by 1987. Junction list Auxiliary routes MD 408A is the designation for the Patuxent Wetland Park entrance road, which runs from a cul-de-sac east to MD 408B at Waysons Corner. MD 408B is designation for an unnamed road that runs from MD 408, between MD 4 and MD 794, north to the end of state maintenance at Waysons Corner. MD 408B connects MD 408 with MD 408A, some businesses, and a trailer park. See also References External links MDRoads: MD 408 408 Maryland Route 408