Guidance for the Design and Application of Shoulder and Centerline Rumble Strips
This report provides guidance for the design and application of shoulder and centerline rumble strips as an effective crash reduction measure, while minimizing adverse effects for motorcyclists, bicyclists, and nearby residents. Using the results of previous studies and the research conducted under this project, safety effectiveness estimates were developed for shoulder rumble strips on rural freeways and rural two-lane roads and for centerline rumble strips on rural and urban two-lane roads.
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Section 4 Review of Completed Shoulder
Section 5 Existing Rumble Strip Practices and Policies
Section 6 Safety Effectiveness of Shoulder Rumble Strips
Section 7 Safety Effectiveness of Centerline Rumble Strips
Summary of Key Findings
Section 9 Optimum Dimensions for Rumble Strips
Section 10 Rumble Strip Application and Design Criteria
Section 11 Conclusions and Recommendations
Appendix D Roadside Hazard Rating Category Descriptions
Appendix F GLM Analysis Results for Safety Effectiveness
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accident asphalt before-after bicycle bicyclists ble strips centerline rumble strips CL Rural Crash counts crash frequency crash type divided highways nonfreeways drivers edgeline effectiveness of centerline effectiveness of shoulder frwy heavy vehicles horizontal curves installation of centerline km/h length milled rumble strips Minnesota multilane divided highways multilane undivided Non-edgeline nontreatment sites Number of sites p-value Estimate pavement markings Pennsylvania percent reduction reduction in SVROR retroreflectivity roadway types rumble strip dimensions rumble strip patterns rumble strips installed Rural multilane divided rural two-lane roads safety effectiveness safety evaluation shoulder and centerline shoulder rumble strips shoulder width sideswipe significant at 90 signiﬁcant results sound level difference speciﬁcally speed standard error statistically signiﬁcant strips are installed strips were installed SVROR crashes SVROR FI crashes Table target crashes TOT crashes trafﬁc transportation agencies travel lane treatment sites Type 3 p-value Urban freeways variables vibration videolog