 MD 704 was expanded to a divided highway from the District of Columbia boundary to Addison Road in Seat Pleasant in 1962 . The segment of divided highway at the US 50 interchange was extended west to Ardwick Ardmore Road in Glenarden in 1969 . MD 704 's modern cloverleaf interchange with MD 202 was completed in 1971 , the same year the former highway was expanded to a divided highway from Seat Pleasant to just north of the latter highway . The divided highway was extended southwest through Glenarden from Ardwick Ardmore Road to Glenarden Parkway in 1972 and to MD 202 in 1973 . MD 704 was renamed for Martin Luther King , Jr . , in 1987 . The highway 's interchange with US 50 was rebuilt in 1991 in conjunction with the overhaul of the US 50 – Capital Beltway interchange immediately to the west ; two of the interchange 's loop ramps with westbound MD 704 were removed . The MD 704 divided highway was extended east from the US 50 interchange to Forbes Boulevard in 1997 and <unk> Vista Road in 1999 . MD 704 and MD 450 were relocated at their junction to make MD 704 part of the east – west axis of a more orthogonal intersection in 2000 . This project was part of the expansion of the final segment of MD 704 and the adjacent portion of MD 450 to a divided highway . 
