Judiciary Square is a Washington Metro station in Washington, D.C. on the Red Line. Judiciary Square is located in Northwest, with entrances at 4th and D Street and 5th and F Street. It serves the many courthouses and municipal buildings in the area. The 5th and F Street entrance is in the National Law Enforcement Officers Memorial, as the monument is built around the escalator and elevators. The 4th and D Street entrance is closed on weekends. Service began on March 27, 1976. This station is also the birthplace of the Metro, as the initial groundbreaking was held here on December 9, 1969.