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The Wyoming Department of Transportation (WYDOT) is a government agency charged with overseeing transportation infrastructure for the U.S. state of Wyoming. WYDOT’s stated mission is “to provide a safe, high quality, and efficient transportation system.” With more than 2,000 employees based in about 60 locations, WYDOT constitutes Wyoming's largest and most widespread state agency. The department is responsible for planning and implementation of road improvement projects, conducting road maintenance, managing driver licenses and motor vehicle programs, supporting airports and aviation and coordinating with the Wyoming Highway Patrol. WYDOT headquarters are located in northwest Cheyenne adjacent to the Central Avenue Interchange (exit 12) on I-25. In addition, road construction and maintenance operations are divided among five field districts, headquartered in Basin, Casper, Laramie, Rock Springs and Sheridan. WYDOT was formed in 1991, incorporating the Wyoming Highway Department, along with the Wyoming Aeronautics Commission and transportation-related elements of the Wyoming Department of Revenue and Taxation and the Wyoming Public Service Commission. The old Highway Department had existed since 1917, when it was created in response to the Federal Aid Road Act of 1916, in which Congress decreed that as a prerequisite for the receipt of federal funds, a state must have a highway department (or similar agency) in place and functioning. Until that time, road improvements were the responsibility of local governments. During the 1920s, as the pace of road improvement picked up, so did the need for maintenance. In Wyoming, the initial maintenance work was very basic in nature and carried on only during the summer. Winter motor travel was practically unknown in those days, consequently the agency’s maintenance forces were laid off in the fall of the year, with only a few mechanics retained to overhaul equipment. ==Winter maintenance begins== Winter maintenance and snow removal outside of the mountainous areas was first undertaken on a large scale in the fall of 1929. Some snow removal on a very limited mileage had been carried on since the Department bought its first snowplow in 1923, but the agency had acquired only 13 plows up until 1929. That year, another 33 plows were purchased. By then, it was becoming obvious that taking steps to effective reduce snow drifting and accumulation on the roads was just as important as snow removal. The department began engineering grade raises, wider rights of way, removal of guardrail and similar drift-causing structures, and the first snow fences were erected during this era 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「Wyoming Department of Transportation」の詳細全文を読む スポンサード リンク
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