Driver decision and procedure to overtake cyclists

[Speaker] Bianchi Piccinini, Giulio:1
[Co-author] Itoh, Makoto:2
1:Chalmers University of Technology (Sweden), 2:University of Tsukuba (Japan)

Although cycling is a healthy transportation mode, cyclists account for a large share of all fatalities in Japan (16%) and the number of cyclist fatalities increased by 7% from 2012 to 2013. Among several accident scenarios, crashes in rural roads where a motorist overtakes a slower bicycle have increased likelihood to lead to severe injuries. In order to better understand the driver's decision process during overtaking of bicycles, an experiment was conducted in the fixed-base driving simulator at University of Tsukuba. Overall, 40 participants were recruited and divided in two groups: 20 younger drivers (25-40 years old) and 20 elderly drivers (65-75 years old). The participants were asked to drive on a rural route and overtake a bicycle under different conditions of Time To Collision between oncoming vehicle and subject vehicle. The analyses will focus on the overtaking decision process and comfort zone boundaries during the overtaking maneuver.
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