| Hokkaido has twice as many fatal head-on collisions as any other prefecture of Japan. Most such[*]collisions occur on suburban two-lane roads. Traditional measures against head-on collisions on[*]such roads are center medians、 center poles and road buttons. However、 it is very expensive to[*]build center strips. Center poles and road buttons have not been widely installed as[*]countermeasures because they hinder snow removal.[*]This research aims to evaluate the effectiveness of rumble strips against head-on collisions.[*]Rumble strips are rectangular grooves incised in the pavement. They warn drivers who deviate[*]from their lane with rumbling sound and vibration of the steering wheel and chassis when the[*]vehicle encounters the rumble strip. We propose installation methods and optimum standard for[*]rumble strips and describes their effectiveness as a measure against head-on collision. |
