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発表 Optimization of Vehicle Travel Position on Roundabouts in Snowy Cold Regions

作成年度 2011年度
論文名 Optimization of Vehicle Travel Position on Roundabouts in Snowy Cold Regions
論文名(和訳) 積雪寒冷地におけるラウンドアバウト走行位置の適正化に関する研究
論文副題
発表会 91st TRB Annual Meeting
誌名(No./号数)
発表年月日 2012/01/22 ~ 2012/01/26
所属研究室/機関名 著者名(英名)
寒地交通チーム武本 東(TAKEMOTO Azuma)
寒地交通チーム宗広 一徳(MUNEHIRO Kazunori)
寒地交通チーム高橋 尚人(TAKAHASHI Naoto)
寒地交通チーム渡邊 政義(WATANABE Masayoshi)
北海道開発局村上 睦(MURAKAMI Mutsumi)
北海道開発局川村 雅洋(KAWAMURA Masahiro)
抄録
Recently、 modern roundabouts have been actively introduced in various countries. Single-lane[*] roundabouts help to prevent serious accidents because vehicles tend to slow down due to the transverse[*] acceleration that acts on them during movement on the circulatory roadway. However、 as the boundary[*] between the circulatory roadway and the truck apron becomes unclear during winter in snowy cold[*] regions、 it is necessary to verify the practicality of roundabouts in consideration of winter road surface[*] and meteorological conditions.[*] This study examined a method of guiding vehicles on circulatory roadways in winter. Driving[*] experiments were conducted at a roundabout with different road surface conditions and central-island[*] diameters to allow analysis of the positions of vehicles traveling under each set of conditions. The[*] results indicated that vehicles were able to stay on course regardless of the central-island diameter in[*] dry road surface conditions. With winter road surface conditions、 however、 the number of vehicles[*] mounting the truck apron increased when the island diameter was small、 while a large diameter helped[*] them to stay on course and reduced travel position variations. An examination of driving behavior under[*] different road surface conditions and with different central-island diameters revealed that surface[*] conditions affected travel speed and transverse acceleration、 while the island diameter had a smaller[*] impact. It was thus found that the adoption of a large central-island diameter in a constant inscribed[*] circle diameter was effective in reducing travel position deviation and helped vehicles to stay on the[*] circulatory roadway even during winter in snowy cold regions.
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