 Maryland Route 704 (MD 704) is a state highway in the U.S. state of Maryland. Known as Martin Luther King Jr. Highway, the highway runs 6.53 miles (10.51 km) from Eastern Avenue at the District of Columbia boundary in Seat Pleasant east to MD 450 in Lanham. MD 704 is a four- to six-lane divided highway that connects the northern Prince George's County communities of Seat Pleasant, Landover, Glenarden, and Lanham. The highway was constructed along the right of way of the abandoned Washington, Baltimore and Annapolis Electric Railway (WB & A) in the early 1940s. In the late 1950s and early 1960s, MD 704 served as a temporary routing of U.S. Route 50 (US 50) while the U.S. Highway's freeway was under construction from Washington to Lanham. The route was expanded to a divided highway between Seat Pleasant and US 50 in the late 1960s and early 1970s. MD 704 was completed as a divided highway when the portion east of US 50 was expanded in the late 1990s.
