Guidance for the Design and Application of Shoulder and Centerline Rumble StripsThis 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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Results 1-3 of 26
Page 73
... significant results at the 90 or 95 percent confidence level based on the Type 3 p - value . Each of these results is counter- intuitive . • Of the 12 analyses based on FI crashes ( Table 34 ) , 2 yield significant results at the 90 or ...
... significant results at the 90 or 95 percent confidence level based on the Type 3 p - value . Each of these results is counter- intuitive . • Of the 12 analyses based on FI crashes ( Table 34 ) , 2 yield significant results at the 90 or ...
Page 78
Darren J. Torbic. results at the 95 or 90 percent confidence level . Seven of the statistically significant results indicate a significant decrease in SVROR crashes when shoulder rumble strips are installed , while eight indicate a ...
Darren J. Torbic. results at the 95 or 90 percent confidence level . Seven of the statistically significant results indicate a significant decrease in SVROR crashes when shoulder rumble strips are installed , while eight indicate a ...
Page 109
... significant results at the 90 or 95 per- cent confidence level . Each significant result for rural two- lane roads indicates a decrease in FI crashes when centerline rumble strips are installed . • Of the five separate analyses based on ...
... significant results at the 90 or 95 per- cent confidence level . Each significant result for rural two- lane roads indicates a decrease in FI crashes when centerline rumble strips are installed . • Of the five separate analyses based on ...
Contents
Summary | 1 |
Section 2 Magnitude and Nature of Highway Safety Concerns | 7 |
Section 3 Purpose Types and Dimensions | 13 |
Copyright | |
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Common terms and phrases
ambient analysis approaches Asphalt before-after bicyclists ble strips centerline rumble strips CL Not significant Combined Crash counts crash data crash frequency crash type drivers edgeline effectiveness of centerline effectiveness of shoulder evaluation of shoulder frwy ft RA horizontal curves included length milled rumble strips Minnesota multilane divided highways noise Non-edgeline nontreatment sites Number of sites Overdispersion p-value Estimate passing zones Pennsylvania percent change indicates percent reduction reduction in SVROR roadway types rumble strip dimensions rumble strip patterns rumble strips installed rural freeways rural multilane divided rural two-lane roads safety effectiveness safety evaluation shoulder and centerline shoulder rumble strips shoulder width sideswipe significant at 90 sound level difference speed standard error statistically significant strips are installed SVROR crashes SVROR FI crashes Table tangent TOT crashes transportation agencies travel lane treatment sites undivided highways nonfreeways Urban freeways urban two-lane roads variables vibration videolog