 South Rolling Road begins again on the north side of the interchange next to the UMBC Training Centers and Tech Incubators.The highway makes a turn at Selford Road just west of that road's crossing of MD 166 and meets the state highway at a pair of carriageways on either side of the park and ride facility.North Rolling Road begins at MD 144 (Frederick Road) several blocks west of MD 166 on the west side of Catonsville.