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In the U.S. state of Massachusetts, the highway division of the Massachusetts Department of Transportation (MassDOT) assigns and marks a system of state-numbered routes. U.S. Highways and Interstate Highways are included in the system; the only overlaps are with the end-to-end U.S. Route 3 and Route 3 and the far-apart Interstate 295, shared with Rhode Island, and Route 295, shared with New York State. A state highway in Massachusetts is a road maintained by the state, which may or may not have a number. Not all numbered routes are maintained or owned by the state. ==History== The Massachusetts Highway Commission (MHC) was the first highway commission in the U.S., formed in 1893 in response to a commission of inquiry finding that over 90% of the public roads in the state were in poor condition.〔Massachusetts Registry of Motor Vehicles, (History of the Massachusetts License Plate )〕 The first state highway in Massachusetts was a 5305.17-foot (1617.02 m) section of Fitchburg Road (now Main Street, part of Route 119) in Ashby. The MHC laid it out as a state highway on August 15, 1894 from a point west of South Road to a point west of Route 31. The road was paved with 15–20 foot (4.5–6 m) macadam, with work beginning August 21, 1894 and ending July 15, 1895. The 50–66 foot (15–20 m) right-of-way is still owned by MassDOT under the original layout.〔MassDOT state highway layout plan (1 ) (August 15, 1894)〕〔MassDOT state highway layout plans: (About page )〕 Massachusetts first gained numbered routes in 1922, with the formation of the New England Interstate Highways. Three-digit numbers were reserved for shorter routes. Route 138 and Route 140 were designated by 1925, and by 1926 the numbers from Route 101 to Route 142 (except Route 136) had been assigned. The establishment of the U.S. Highway System in 1926 resulted in several of the New England Interstate routes having to be renumbered. The New England Interstate routes that conflicted with new U.S. Highway numbers were assigned newly freed single-digit numbers. Beginning in 1929, local routes were assigned new two-digit numbers. With the exception of Route 143, which was renumbered from Route 109A ca. 1933, new routes were given two-digit numbers for a while. Larger three-digit numbers were eventually assigned. Over the years, most of the state's highways were been maintained by a varied list of agencies, including the Massachusetts Highway Department, Massachusetts Turnpike Authority, and the Massachusetts Port Authority, but are now maintained by the consolidated MassDOT. The Massachusetts Department of Conservation and Recreation's Bureau of Engineering still manages and/or operates a number of parkways across the Commonwealth. All routes that end at a state border and continue as a numbered route on the other side have been renumbered on one side of the border to match. Except for Route 295, far from Interstate 295, numbers that were duplicated with Interstate Highways were renumbered, mostly in 1959 when the Interstate numbers were assigned. *The longest numbered highway in the state is U.S. Route 20, which runs for . *The longest state highway is Route 28, which runs for . *The longest Interstate highway in Massachusetts is Interstate 90 (the Mass Pike), which runs . *The shortest route in Massachusetts is Route 15, which runs for only . The shortest signed highway is Route 108, which runs for . Both are short extensions of state highways in neighboring states. The shortest route completely within state borders is Route 240, which runs for . *The shortest Interstate in Massachusetts is Interstate 295, which runs as a extension of I-295 in Rhode Island. 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「Massachusetts State Highway System」の詳細全文を読む スポンサード リンク
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