北海道開発土木研究所

Please direct any comments or inquiries regarding this Web site to the Traffic Engineering Division, CERI.


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May 19, 2005 (NEW!): Workshop on rumble strips technologies is held on May 18 (Wed.). Click here to see a movie of the workshop. You can also see the movie by downloading the file.

April 22, 2005: Rumble strips workshop is scheduled for May 18 (Wed).
For details, please download the PDF file.

February 23, 2005: Accident reduction effect (interim report) is added to Diffusion.
July 14, 2004: Accident reduction effect (preliminary figures) added to Diffusion.

March 1, 2004: Rumble strips Web site opens.