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Traffic cones, also called traffic pylons, road cones, highway cones, safety cones, witch's hat, or construction cones, are usually cone-shaped markers that are placed on roads or footpaths to temporarily redirect traffic in a safe manner. They are often used to create separation or merge lanes during road construction projects or automobile accidents, although heavier, more permanent markers or signs are used if the diversion is to stay in place for a long period of time. ==History== Traffic cones were invented in 1940 by American Charles D. Scanlon, who got the idea for the traffic cone while working as a painter for the Street Painting Department of the City of Los Angeles.〔(【引用サイトリンク】url=http://www.leagle.com/decision/1954760214F2d546_1587 )〕 The patent for his invention was granted in 1943.〔(【引用サイトリンク】url=https://www.google.com/patents/US2333273 )〕 The first traffic cones used in the United Kingdom occurred In 1958, when the M6 motorway opened. These traffic cones were a substitute for red lantern paraffin burners being used during construction on the Preston Bypass.〔(【引用サイトリンク】title=Cones )〕 In 1961, David Morgan of Burford, Oxfordshire, UK believes that he constructed the first experimental plastic traffic cones, which replaced pyramid-shaped wooden ones previously used. In the United States on May 1, 1959 the Pacific Gas and Electric Company in Oakland California adopted the policy of placing the orange safety cones at left front and the left rear corners of the service truck while parked on the street to increase visibility and safety for the workers, This policy was implemented as the result of a Cable Splicers suggestion. The employee, Russell Storch, was awarded $45.00 for his suggestion. This policy is still in use today.〔PG&E file number 761.1, Suggestion number 1-1759 a letter dated May 1, 1959 from PG&E awarding Mr. Russell Storch an employee of PG&E $45.00 for his suggestion of the use of the cones〕 Although originally made of concrete, today's versions are more commonly brightly colored thermoplastic or rubber cones. Recycled PVCs from bottles can be used to create modern traffic cones. Not all traffic cones are conical. Pillar-shaped movable bollards fulfill a similar function. 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「Traffic cone」の詳細全文を読む スポンサード リンク
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