State Route 27 (SR 27) is a freeway in Arlington County, Virginia, in the United States, known as Washington Boulevard. It was built during World War II to connect the Pentagon with U.S. Route 50 (US 50) and northern Arlington to the west and Washington, DC, to the east. Its route parallels the southern boundaries of Arlington National Cemetery. At its southernmost point, Route 27 passes through a complex interchange with Interstate 395 (I-395, Shirley Highway). called the "Mixing Bowl," although local motorists more recently use that term also to refer to the Springfield Interchange on the Capital Beltway in Springfield. It is an important commuter route as well as providing access to a number of military installations, the cemetery and national memorials. Because Route 27 is the closest road to the site of the September 11 attack on the Pentagon, the route has been designated the "9/11 Heroes Memorial Highway."