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Maryland Route 210 (MD 210) is a state highway in the U.S. state of Maryland. Known as Indian Head Highway, the highway runs from Potomac Avenue in Indian Head north to the District of Columbia boundary in Forest Heights, where the highway continues into Washington as South Capitol Street. MD 210 is a four- to six-lane divided highway that connects Washington with the suburban communities of Oxon Hill, Fort Washington, and Accokeek southwestern Prince George's County and Bryans Road and Indian Head in northwestern Charles County. The highway also provides access to Fort Washington Park and Indian Head Naval Surface Warfare Center and, in conjunction with MD 228, connects Waldorf with Interstate 95, I-495, and I-295. Indian Head Highway was constructed by the U.S. federal government as a military access highway in the mid-1940s to connect Washington with the Indian Head Naval Proving Ground and Fort Washington. The previous highway between Washington and Indian Head was Livingston Road, which was traced in the late 18th century and improved in the 1920s and early 1930s as MD 224. The new highway incorporated several sections of meandering MD 224 into its straight path. Indian Head Highway was fully designated MD 210 in the mid-1950s when the road was transferred from federal to state control. MD 210 was expanded to a divided highway in Forest Heights in the late 1940s and south through Fort Washington in the 1960s. Another section of divided highway was completed through Charles County in the late 1960s and early 1970s. The final divided highway section was completed through Accokeek in the mid-1980s. MD 210 was connected with I-295 in 1989 and its interchange with I-95 and I-495 was reconstructed in the mid-2000s. The Maryland State Highway Administration has long-term plans to replace the highway's major intersections with interchanges from Oxon Hill south through Fort Washington. ==Route description== MD 210 begins at an intersection with Potomac Avenue in the town of Indian Head. Indian Head Highway continues west as a municipally maintained boulevard west to the entrance of the Indian Head Naval Surface Warfare Center at the west end of town. MD 210 heads east as a four-lane divided highway through the eastern part of town parallel to Strauss Avenue, which splits southeast just east of Potomac Avenue. The state highway leaves the town and enters Potomac Heights, where it meets the western end of MD 225 (Hawthorne Road). MD 210 leaves the populated area and passes to the south of Chapman State Park, which contains the historic farm complex Mount Aventine. The highway reenters a suburban area in the community of Bryans Road, where the highway intersects MD 227; MD 227 heads north as Marshall Hall Road and south as Livingston Road. East of MD 227, MD 210 is paralleled by frontage roads intermittently to its northern terminus.〔〔 MD 210 enters Prince George's County and Livingston Road splits to the north and the state highway enters Accokeek. Southwest of MD 228 at Pine Drive, which is unsigned MD 810G, eight spectators of an illegal street drag race were killed in the early morning hours of February 16, 2008, by a vehicle not involved in the drag race while standing in the middle of the northbound carriageway of MD 210.〔 MD 210 expands to six lanes and its traffic volume doubles beyond its continuous-flow intersection with MD 228 (Berry Road). The highway intersects Livingston Road again in the center of Accokeek; that highway heads east as MD 373 and west as MD 810J before becoming a county highway. MD 210 intersects Farmington Road and curves north to cross Piscataway Creek. The state highway continues along the eastern edge of Fort Washington, where it intersects Old Fort Road and Swan Creek Road; the latter provides access to Livingston Road, which switches to the west side of the state highway. MD 210 intersects Fort Washington Road, which leads to Fort Washington Park, and Old Fort Road again east of historic Harmony Hall and St. John's Church, which are accessed from Livingston Road. Livingston Road reconnects with MD 210 at Palmer Road, north of which the state highway crosses Henson Creek.〔〔 MD 210 crosses Carey Branch and has an intersection with Kerby Hill Road and Livingston Road; the latter splits northeast toward Oxon Hill. North of Wilson Bridge Drive, MD 210 expands to eight lanes and meets the southern end of two-lane ramps from northbound MD 210 to I-295 (Anacostia Freeway) and from I-295 to southbound MD 210. The ramp to southbound MD 210 also receives traffic from northbound I-95 and I-495 (Capital Beltway) just east of the Woodrow Wilson Bridge, and the ramp from northbound MD 210 also provides access to the northbound Beltway and the southbound express lanes of the Beltway, which bypass the exits for I-295 and U.S. Route 1 and Virginia State Route 241 in Alexandria. North of those ramps, MD 210 continues as a four-lane divided highway and has a partial cloverleaf interchange with MD 414 (Oxon Hill Road), which provides access to the Oxon Hill Farm and National Harbor; access from the northbound direction of the Beltway to northbound MD 210 is via MD 414.〔〔 MD 210 becomes six lanes again, crosses the quad-carriageway Beltway, and completes the Beltway access with several ramps connecting with the local lanes of the southbound Beltway. MD 210 continues north as a four-lane divided highway through the town of Forest Heights; the frontage road on the southbound side of the highway is Sachem Drive. At the north end of the residential town, the state highway meets the northern end of the northernmost Maryland segment of Livingston Road. Southbound MD 210 gains a third lane and the highway continues through a commercial area. The state highway becomes undivided just south of its terminus at the District of Columbia boundary at Southern Avenue. The highway continues north as South Capitol Street through Bellevue and Anacostia. Just north of the intersection, the Washington segment of Livingston Road splits to the north.〔〔 MD 210 is a part of the main National Highway System from MD 228 in Accokeek to I-95, I-295, and I-495 in Oxon Hill.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Maryland Route 210」の詳細全文を読む スポンサード リンク
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