9th and 12th Street Expressways: Difference between revisions
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merged 9th Street Expressway and 12th Street Expressway into Interstate 395 (Virginia–District of Columbia) Tag: New redirect |
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#REDIRECT [[Interstate 395 (Virginia–District of Columbia)#Related highways]] |
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{{Infobox road |
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|state = DC |
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|name = 9th Street Expressway<br />12th Street Expressway |
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|map = {{maplink|frame=yes|plain=yes|frame-align=center|type=line|raw={{Wikipedia:Map data/Wikipedia KML/9th and 12th Street Expressways}}}} |
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|map_custom = yes |
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|map_notes = 12th Street Expressway (left) and 9th Street Expressway (right) highlighted in red |
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|length_mi = 0.9 |
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|length_ref = <ref name=9th>{{google maps |url = https://goo.gl/maps/Ky2ZbNP9kBm |title = 9th Street Expressway |access-date = December 4, 2016 }}</ref><ref name=12th>{{google maps |link = no |url = https://goo.gl/maps/8nGwMEytF9t |title = 12th Street Expressway |access-date = December 4, 2016 }}</ref> |
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|established = late 1960s{{citation needed|date=September 2019}} |
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|restrictions = No vehicles over {{cvt|13|ft|m}} |
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|direction_a = South |
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|terminus_a = [[Maine Avenue (Washington, D.C.)|Maine Avenue]] in [[Southwest Waterfront]] |
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|junction = {{jct|state=DC|I|395}} in Southwest Waterfront |
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|direction_b = North |
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|terminus_b = {{jct|state=DC|US|1|US|50}} in [[Federal Triangle]]\ |
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}} |
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The '''9th Street Expressway''' and the '''12th Street Expressway''' are a pair of spurs connecting [[Interstate 395 (District of Columbia–Virginia)|Interstate 395]] (I-395; Southwest Freeway) with [[Downtown, Washington, D.C.|Downtown]] [[Washington, D.C.]] The two carriageways are {{convert|0.2|mi|m}} apart from each other, and gain their namesake from the roads that they lead into once reaching the downtown [[Federal Triangle]] neighborhood. |
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Both expressways travel underneath the [[National Mall]] via the '''9th Street Tunnel''' and the '''12th Street Tunnel''', which are often seen as alternatives to the nearby [[Interstate 395 (Virginia–District of Columbia)|3rd Street Tunnel]] of I-395. |
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==Route description== |
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The 9th Street Expressway carriageway begins at an intersection with [[Maine Avenue (Washington, D.C.)|Maine Avenue SW]] in the [[Southwest Waterfront]] neighborhood of the city. This intersection also connects to G Street SW and [[L'Enfant Promenade]]. Just north of here, the 9th Street Expressway crosses over [[Interstate 395 (District of Columbia–Virginia)|I-395]] (Southwest Freeway). At this interchange, the 12th Street Expressway begins, feeding traffic off of a ramp that extends onto the [[Francis Case Memorial Bridge]]. Northbound I-395 has a direct connection to 12th Street via exit 3, but I-395 south must use exit 4, which also serves Maine Avenue. The 12th Street Expressway has an exit to D Street SW, also serving L'Enfant Promenade and buildings of the [[General Services Administration]]. The segment of the 9th Street Expressway between I-395 and D Street in fact tunnels underneath a building on [[L'Enfant Plaza]] that houses the [[National Transportation Safety Board]].<ref name=9th/><ref name=12th/> |
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Both roads receive on-ramps leading from [[Independence Avenue (Washington, D.C.)|Independence Avenue]], just south of the twin tunnels that travel underneath the [[National Mall]]. Now in [[Federal Triangle]] of the [[Northwest, Washington, D.C.|Northwest]] quadrant, both roads terminate at an intersection with [[Constitution Avenue (Washington, D.C.)|Constitution Avenue NW]], while both rights-of-way continue northbound via 9th and 12th Streets NW. Although signage is rare and quite small, Constitution Avenue at this intersection carries the designation of both [[U.S. Route 1 in the District of Columbia|U.S. Route 1]] (US 1) and [[U.S. Route 50 in the District of Columbia|US 50]].<ref name=9th/><ref name=12th/> |
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==History== |
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{{expand section|date=December 2016}} |
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In the late 1960s, the Southwest Freeway and the 9th and 12th Street Expressways both opened. The spur routes originally terminated with [[Interstate 95 in the District of Columbia|I-95]], before [[freeway revolts]] canceled other projects in the district that resulted in a route designation change. |
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==Exit list== |
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The entire route is in [[Washington, D.C.]] {{jcttop|state=DC|nocty=yes|unnum=yes|length_ref=<ref name=9th/><ref name=12th/>}} |
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{{DCint |
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|location_special=[[Southwest Waterfront]] |
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|lspan=4 |
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|mile=0.0 |
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|road=[[Maine Avenue (Washington, D.C.)|Main Avenue SW]] / [[L'Enfant Promenade]] / D Street SW |
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|notes=[[At-grade intersection]] southbound; entrance ramps northbound |
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}} |
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{{DCint |
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|mile=0.2 |
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|type=incomplete |
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|road={{jct|state=DC|I|395|I|695|to2=yes|location1=[[Richmond, Virginia|Richmond]]}} |
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|notes=Southbound exit and northbound entrance; I-395 exits 3-4 |
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}} |
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{{DCint |
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|mile=0.30 |
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|mspan=2 |
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|type=incomplete |
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|road=Frontage Road SW |
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|notes=Northbound entrance only |
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}} |
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{{DCint |
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|mile=none |
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|type=incomplete |
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|road=[[Independence Avenue (Washington, D.C.)|Independence Avenue SW]] |
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|notes=No exit ramps |
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}} |
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{{jcttunnel |
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|location_special=[[National Mall]] |
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|mile=0.5 |
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|mile2=0.8 |
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|tunnel=9th Street Tunnel (southbound) and 12th Street Tunnel (northbound) |
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}} |
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{{DCint |
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|location_special=[[Federal Triangle]] |
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|mile=0.9 |
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|road={{jct|state=DC|US|1|US|50|name2=[[Constitution Avenue (Washington, D.C.)|Constitution Avenue NW]]|location1=[[Capital One Arena]]|location2=[[Walter E. Washington Convention Center|Convention Center]]}} |
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|notes=At-grade intersection |
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}} |
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{{jctbtm|keys=incomplete}} |
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==See also== |
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* {{Portal-inline|U.S. Roads}} |
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==References== |
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{{reflist}} |
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{{Streets in Washington, DC}} |
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[[Category:Expressways in the United States]] |
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[[Category:Roads in Washington, D.C.]] |
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[[Category:Tunnels in Washington, D.C.]] |
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[[Category:Road tunnels in the United States]] |
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