Guidance for the Design and Application of Shoulder and Centerline Rumble Strips (2009) / Chapter Skim
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Pages 15-21
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From page 15... ...
The information is organized as follows: • Safety impacts of shoulder rumble strips, • Safety impacts of centerline rumble strips, • Operational impacts of centerline rumble strips, • Vehicle dynamics related to vibration and noise stimuli, • Effects of rumble strips on specific types of highway users (i.e., motorists, motorcyclists, and bicyclists) , • Pavement performance issues, and • Other potential adverse concerns.
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From page 16... ...
Only one study investigated the safety effectiveness of centerline rumble strips along another type of roadway (i.e., rural multilane highways)
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before–after Table 5. Summary of safety benefits attributed to installation of centerline rumble strips.
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Effects of Rumble Strips on Specific Types of Highway Users In most cases, the intended effect of shoulder and centerline rumble strips is to alert inattentive or drowsy drivers of motor vehicles that their vehicles have departed from the travel lane. However, shoulder and/or centerline rumble strips may also cause unintended behaviors or may negatively impact certain types of highway users such as motorcyclists and bicyclists.
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From page 19... ...
Several maintenance concerns associated with shoulder and centerline rumble strips have been reported. Maintenance crews reported concerns that heavy traffic would cause shoulder pavements with rumble strips to deteriorate faster and that the freeze-thaw cycle of water collecting in the grooves would crack the pavement.
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From page 20... ...
For shoulder and centerline rumble strips, noise is generated only by errant motor vehicles, not by every motor vehicle. Although the noise produced by shoulder and centerline rumble strips is intermittent, transportation agencies continue to receive complaints from nearby residents.
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From page 21... ...
Yet, another possibility is to provide a gap in the rumble strip pattern to allow bicyclists to cross back and forth from the paved shoulder to the travel lane without having to encounter rumble strips. A general concern with centerline rumble strips is that motorists may not provide sufficient clearance distance between the bicyclist and the motor vehicle when passing a bicyclist on a section of roadway with centerline rumble strips.
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