Guidance for the Design and Application of Shoulder and Centerline Rumble Strips (2009) / Chapter Skim
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Pages 4-5
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Phase I was accomplished by summarizing completed and ongoing research, conducting a survey of transportation agencies to identify existing rumble strip policies and guidelines, identifying the gaps in research and practices, and selecting the highest priority issues for further investigation. The scope of Phase II was to conduct research on key unresolved issues primarily associated with shoulder rumble strips, but several of the issues also relate to centerline rumble strip applications.
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From page 5... ...
The scope of Phase III was to conduct research on key unresolved issues primarily associated with centerline rumble strips. The key issues investigated during Phase III included the following: • Safety effectiveness of centerline rumble strips on different types of roads, • Safety effectiveness of centerline rumble strips along varying roadway geometry, • Safety effectiveness of centerline rumble strips installed in combination with shoulder rumble strips, and • Difference in safety effectiveness of shoulder rumble strips installed along the right (outside)
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