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発表 Evaluation of the Infuluences of Changes in Road Surface Conditions on Driving Behavior at Roundabouts

作成年度 2010年度
論文名 Evaluation of the Infuluences of Changes in Road Surface Conditions on Driving Behavior at Roundabouts
論文名(和訳) ラウンドアバウトの運転挙動に関する路面状態の変動の影響評価
論文副題
発表会 90th TRB Annual Meeting
誌名(No./号数)
発表年月日 2011/01/23 ~ 2011/01/27
所属研究室/機関名 著者名(英名)
寒地交通チーム宗広 一徳(MUNEHIRO Kazunori)
寒地交通チーム武本 東(TAKEMOTO Azuma)
寒地交通チーム葛西 聡(KASAI Satoshi)
抄録
To ensure safe driving、 it is very important for drivers to appropriately perceive road alignment、 pavement markings、 various road accessories and road surface conditions. However、 road surface conditions change with the weather、 and in cold、 snowy regions can vary widely from dry to wet to compacted snow during the winter months. Compacted-snow-covered roads pose a range of problems、 including preventing drivers from seeing pavement markings and making roads slippery. As the northern part of Japan is characterized by the harsh weather conditions commonly seen in cold、 snowy regions、 there is increasing interest in the evaluation of drivability and safety for modern roundabouts in various weather and road surface environments. The authors installed a small single-lane roundabout for experimental purposes on the Tomakomai Test Track in Hokkaido、 Japan、 in autumn 2009 and winter 2010 to enable related driving tests. A total of 16 subjects participated in these tests and drove test vehicles、 some of which were equipped with a driving-behavior monitoring system. The road conditions tested were those with dry and compacted-snow-covered surfaces. After a period of driving involving the roundabout、 the drivers were asked to answer a questionnaire indicating subjective assessment of drivability and safety. The results showed that the speeds of vehicles approaching the roundabout when the road was covered in compacted snow were lower than in dry、 thereby demonstrating a greater speed reduction effect. Subjective assessment suggested that drivability and safety in compacted-snow-covered road conditions were much lower than those in dry road conditions.
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