Study Details

Study Title: Benefit/Cost Evaluation of MoDOT's Total Striping and Delineation Program: Phase II

Authors: Potts et al.

Publication Date:JUN, 2011

Abstract: In 2005 and 2006, the Missouri Department of Transportation (MoDOT) undertook a major program, known as the Smooth Roads Initiative (SRI), to improve both the rideability and the visibility of over 2,300 mi of major roadways in Missouri. MRIGlobal previously conducted research for MoDOT to evaluate the safety effectiveness of SRI improvements and perform a benefit-cost evaluation of those improvements. The initial evaluation of SRI improvements was conducted using three years of crash data before implementation of SRI improvements and only one year of crash data after SRI implementation, because only one year of "after" crash data was available at the time. The evaluation presented in this report was conducted after two additional years of crash data were available; thus, the evaluation includes a three-year before study period and a three-year after study period. The safety evaluation indicated that the striping and delineation program resulted in an overall reduction of 16 percent in fatal-and-disabling-injury crashes and 11 percent in fatal-and-all-injury crashes. The striping and delineation improvements appeared to be particularly effective in reducing multiple-vehicle crashes. Results of the benefit-cost evaluation suggested that the SRI projects had an overall benefit-cost ratio of 11.2. NOTE 1 - Additional CMFs available in paper and appendix. NOTE 2 - Phase I previously published as a 2010 TRB paper. Phase II includes the most up to date data.

Study Citation: Potts, I.B., D.W. Harwood, C.D. Bokenkroger, and M.M. Knoshaug. "Benefit/Cost Evaluation of MoDOT's Total Striping and Delineation Program: Phase II". MRIGlobal Project No. 110749, Missouri Department of Transportation, June 2011.


CMFs Associated With This Study

Category: Delineation

Countermeasure: Install wider markings and both edgeline and centerline rumble strips with resurfacing

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.53473 StarsAllK,ANot specifiedRural
0.62383 StarsAllK,A,B,CNot specifiedRural

Countermeasure: Install wider markings and edgeline rumble strips with resurfacing

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.75254 StarsAllK,APrincipal Arterial Other Freeways and ExpresswaysRural
0.76244 StarsAllK,A,B,CPrincipal Arterial Other Freeways and ExpresswaysRural
0.9104 StarsAllK,A,B,CPrincipal Arterial Other Freeways and ExpresswaysUrban
0.76244 StarsAllK,ANot specifiedRural
0.74264 StarsAllK,A,B,CNot specifiedRural
0.86144 StarsAllK,A,B,CNot specifiedUrban

Countermeasure: Install wider markings and shoulder rumble strips with resurfacing

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.74264 StarsAllK,APrincipal Arterial Other Freeways and ExpresswaysRural
0.77234 StarsAllK,A,B,CPrincipal Arterial Other Freeways and ExpresswaysRural
0.8204 StarsAllK,A,B,CPrincipal Arterial Other Freeways and ExpresswaysUrban
0.51493 StarsAllK,ANot specifiedRural
0.75254 StarsAllK,A,B,CNot specifiedRural

Countermeasure: Install wider markings with resurfacing

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.79214 StarsAllK,APrincipal Arterial Other Freeways and ExpresswaysRural
0.9194 StarsAllK,A,B,CPrincipal Arterial Other Freeways and ExpresswaysRural
0.9644 StarsAllK,A,B,CPrincipal Arterial Other Freeways and ExpresswaysUrban
0.66344 StarsAllK,ANot specifiedRural
0.75254 StarsAllK,A,B,CNot specifiedRural
0.54463 StarsAllK,ANot specifiedRural
0.9284 StarsAllK,A,B,CNot specifiedUrban
0.62383 StarsAllK,ANot specifiedUrban

Countermeasure: Install wider markings WITHOUT resurfacing

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.78224 StarsAllK,A,B,CPrincipal Arterial Other Freeways and ExpresswaysRural