Rumble Strips Crash Modification Factors

A summary of crash modification factors for shoulder and centerline rumble strips is provided in the table below.

TreatmentCrash TypeCMF
install centerline and shoulder rumble strips (Sayed et al. 2010 ****)injury0.82
cross-median, front and opposing direction, head-on, ROR0.79
install centerline rumble strips (Torbic et al. 2009 *****)injury0.91
head-on, sideswipe0.63
all0.91
install centerline rumble strips (Torbic et al. 2009 ****)ROR injury0.67
install edge line rumble strips on roadways with shoulder < 5 ft. (Torbic et al. 2009 ****)ROR injury0.50 to 1.30
install edge line rumble strips on roadways with shoulder > 5 ft. (Torbic et al. 2009 ****)ROR injury0.34 to 1.11
install continuous mill-in shoulder rumble strips (Perillo, 1998 ****)SVROR (rural and urban)0.21
install continuous mill-in shoulder rumble strips (Carrasco et al. 2004 ***)ROR0.9
ROR injury0.78
all0.84
injury0.83
install continuous rolled-in shoulder rumble strips (Griffith, 1999 ***)SVROR0.79
SVROR injury0.93
install shoulder rumble strips (Torbic et al. 2009 *****)all1.18
ROR0.84 to 1.40
ROR injury0.64 to 0.83
install shoulder rumble strips (Patel et al. 2007 ****; Sayed et al. 2010 ****)ROR0.74 to 0.87
install shoulder rumble strips (Torbic al, 2009 ****; Smith and Ivan, 2005 ***)all0.76 to 1.28
injury0.58 to 1.07
ROR0.62 to 1.45
ROR injury0.63 to 1.15

References

Carrasco, O., J. McFadden, and P. Chandhok. “Evaluation of the Effectiveness of Shoulder Rumble Strips on Rural Multi-lane Divided Highways in Minnesota.” 83rd Transportation Research Board Annual Meeting, Washington DC, 2004.

Griffith, M. S., “Safety Evaluation of Rolled-In Continuous Shoulder Rumble Strips Installed on Freeways.” 78th Transportation Research Board Annual Meeting, Washington, DC, 1999.

Patel, R. B., F. M. Council, and M. S. Griffith. “Estimating the Safety Benefits of Shoulder Rumble Strips on Two Lane Rural Highways in Minnesota: An Empirical Bayes Observational Before-After Study.” TRB 86th Annual Meeting: Compendium of Papers CD-ROM, Washington, DC, 2007.

Perrillo, K., The Effectiveness and Use of Continuous Shoulder Rumble Strips. Federal Highway Administration, Albany, NY, 1998.

Sayed, T., P. deLeur, and J. Pump. “Impact of Rumble Strips on Collision Reduction on BC Highways: A Comprehensive Before and After Safety Study.” TRB 89th Annual Meeting Compendium of Papers CD-ROM, Washington, DC, 2010.

Smith, E. B. and J. N. Ivan. “Evaluation of Safety Benefits and Potential Crash Migration Due to Shoulder Rumble Strip Installation on Freeways in Connecticut.” TRB 84th Annual Meeting: Compendium of Papers CD-ROM, Washington, DC, 2005.

Torbic, D. J., J. M. Hutton, C. D. Bokenkroger, K. M. Bauer, D. W. Harwood, D. K. Gilmore, D. K. Dunn, J. J. Ronchetto, E. T. Donnell, H. J. Sommer III, P. Garvey, B. Persaud, and C. Lyon. NCHRP Report 641 Guidance for the Design and Application of Shoulder and Centerline Rumble Strips. Washington DC, 2009.

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