Вашингтон мен Вирджиниядағы I-395 тас жолы

Interstate Highway in the DC area

Interstate 395 (I 395) in Virginia and Washington, D. C., is a 13.79 mile (22 km) spur route of I 95 that begins at an interchange with I 95 in Springfield and ends at an interchange with US Route 50 (US 50) in Northwest Washington, D. C. It passes underneath the National Mall near the US Capitol and ends at a junction with US 50 at New York Avenue, roughly 1 mile (2 km) north of the 3rd Street Tunnel. Despite its proximity to I 395 in Maryland, the route is unrelated and unconnected. I 395 is known by three different names over its various segments. The Virginia portion is part of the larger Shirley Highway that continues southward on I 95 beyond the terminus of I 395. In the District of Columbia, it is known as the Southwest Freeway from the 14th Street bridges to the Southeast Freeway interchange (I 695) and the Center Leg or Center Leg Freeway from the Southeast Freeway interchange to New York Avenue. The Southwest and Center Leg freeways are collectively denominated as the Dwight D. Eisenhower Freeway. I 395 is planned to be rerouted off of the Center Leg and onto I 695 with the latter route being decommissioned. The Center Leg will then be designated I 195.

The 9th Street Expressway and the 12th Street Expressway are a one way pair of freeway spurs connecting I 395 (Southwest Freeway) with US 1 and US 50 (Constitution Avenue) in Washington, D. C. The expressways also provide connections to the L'Enfant Promenade and Independence Avenue. Both highways pass through tunnels under the National Mall and are named for the streets that extend northward from their respective northern termini. The 9th Street Expressway and the 12th Street Expressway run southbound and northbound, respectively, between I 395 and Constitution Avenue. The 9th Street Expressway begins at the intersection of Constitution Avenue and 9th Street Northwest. The highway heads southbound along the east side of the National Museum of Natural History and descends into the 9th Street Tunnel under the National Mall. The 9th Street Expressway emerges from the tunnel just north of L'Enfant Plaza and receives a ramp from Independence Avenue. At the south end of L'Enfant Plaza, ramps for northbound I 395 and southbound I 395 split from the roadway; the southbound I 395 also provides access to Maine Avenue in the direction of the Tidal Basin. The highway continues south beyond I 395 to an intersection with Maine Avenue at The Wharf (Washington, D. C.). The 12th Street Expressway begins as a flyover ramp from northbound I 395 as the Interstate crosses the Francis Case Memorial Bridge. Southbound I 395 also has a ramp to the expressway as part of its ramp to Maine Avenue. The two ramps both have exits for the L'Enfant Promenade, specifically D Street Southwest. The expressway's ramps from both directions of I 395 merge and the highway descends into the 12th Street Tunnel, before which the highway receives a ramp from Independence Avenue. The 12th Street Expressway passes under the National Mall and then ascends to the west of the National Museum of Natural History to its terminus at the intersection of Constitution Avenue and 12th Street Northwest.