Bicycle-Friendly Shoulder Rumble Strips
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2000-03-01
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Alternative Title:Bicycle-Friendly Shoulder Rumble Strips. University-Based Research, Education and Technology Transfer Program
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TRIS Online Accession Number:1046060
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Edition:Final Report
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Abstract:Shoulder rumble strips have proven to be an effective way to reduce run-off-the-road (ROR) crashes on urban and rural freeways. As the use of shoulder rumble strips is being extended to non-freeway facilities, bicyclists will encounter rumble strips more frequently in the future. Bicyclists are concerned about maneuverability problems while traversing rumble strips, because they can be very uncomfortable to ride over and may cause loss of control of the bicycle. The objective of this project was to develop new rumble strip configurations that decrease the level of vibration experienced by bicyclists when traversing rumble strips, while at the same time providing an adequate amount of stimuli to alert inattentive or drowsy motorists. Four primary steps were involved in the development of the new rumble strip configurations. The first step was to evaluate and assess the existing rumble strip configuration. The second step was to develop, evaluate, and rank different configurations for their potential to be "bicycle-friendly" yet at the same time not degrade the alerting properties for drivers in motor vehicles. A simulation model was developed and validated to evaluate various new designs. The third step was to install several of the recommended configurations that had the greatest potential to be "bicycle-friendly" and conduct field experiments to further evaluate their effectiveness. The final step of the project was to analyze the data and rank the configurations that were installed based on their ability to alert inattentive or drowsy motorists and on their ability to provide a comfortable and controllable ride for bicyclists. Researchers recommended two new "bicycle-friendly" rumble patterns for implementation along non-freeway facilities - one for non-freeway facilities with higher operating speeds near 55 mph (88 kmlh), and one for non-freeway facilities with lower operating speeds near 45 mph (72 km/h).
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