Guidance for the Design and Application of Shoulder and Centerline Rumble Strips (2009) / Chapter Skim
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Pages 142-145
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From page 142... ...
• On rural freeways, shoulder rumble strips should be placed as close to the edgeline as possible to maximize the safety benefits of the measure, taking into consideration other factors such as pavement joints. • Centerline rumble strips are also an effective low-cost crash mitigation measure for undivided roadways with two-way traffic.
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From page 143... ...
, shoulder rumble strip patterns should be designed to produce sound level differences in the range of 10 to 15 dBA in the passenger compartment; and on roadways where bicyclists can be expected or near residential or urban areas, shoulder rumble strip patterns should be designed to produce sound level differences in the range of 6 to 12 dBA in the passenger compartment. • Centerline rumble strip patterns should be designed to produce sound level differences in the range of 10 to 15 dBA in the passenger compartment, except near residential or urban areas where consideration should be given to designing centerline rumble strips to produce sound level differences in the range of 6 to 12 dBA in the passenger compartment.
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From page 144... ...
– Along different roadway types: The most reliable and comprehensive estimates on the safety effectiveness of centerline rumble strips are available for urban and rural two-lane roads. The safety benefits of centerline rumble strips along urban multilane undivided highways (nonfreeways)
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From page 145... ...
A procedure for selecting mitigation measures should then be developed to reduce noise propagation to residents that will experience noise levels above a predetermined minimum level. • Quantify the safety effectiveness of dual application treatments: An attempt was made during this research to quantify the safety effectiveness of dual applications of rumble strips (i.e., sites with both centerline and shoulder rumble strips installed along the same roadway segment)
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