Study Details

Study Title: NCHRP Report 641: Guidance for the Design and Application of Shoulder and Centerline Rumble Strips

Authors: Torbic et al.

Publication Date: 2009

Abstract: This NCHRP Report 641 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. The report will be of particular interest to safety practitioners with responsibility for roadway design.

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

Study Report: Download the Study Report Document


CMFs Associated With This Study

Category: Roadway

Countermeasure: Install centerline rumble strips

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
1.02 -2 4 Stars All All Not Specified Urban
0.89 11 4 Stars All All Not Specified Rural
0.98 2 4 Stars All All Not Specified Rural
1.02 -2 4 Stars All All Not Specified Rural
0.96 4 4 Stars All All Not Specified Rural
0.91 9 4 Stars All K,A,B,C Not Specified Urban
0.78 22 4 Stars All K,A,B,C Not Specified Rural
0.94 6 4 Stars All K,A,B,C Not Specified Rural
1.04 -4 4 Stars All K,A,B,C Not Specified Rural
0.91 9 5 Stars All K,A,B,C Not Specified Rural
0.6 40 4 Stars Head on,Sideswipe All Not Specified Urban
0.51 49 4 Stars Head on,Sideswipe All Not Specified Rural
0.74 26 4 Stars Head on,Sideswipe All Not Specified Rural
0.65 35 3 Stars Head on,Sideswipe All Not Specified Rural
0.63 37 5 Stars Head on,Sideswipe All Not Specified Rural
0.36 64 3 Stars Head on,Sideswipe K,A,B,C Not Specified Urban
0.55 45 4 Stars Head on,Sideswipe K,A,B,C Not Specified Rural
0.56 44 4 Stars Head on,Sideswipe K,A,B,C Not Specified Rural
0.65 35 3 Stars Head on,Sideswipe K,A,B,C Not Specified Rural
0.55 45 5 Stars Head on,Sideswipe K,A,B,C Not Specified Rural
0.91 9 5 Stars All All Not Specified Rural
0.88 12 5 Stars All K,A,B,C Not Specified Rural
0.7 30 5 Stars Head on,Sideswipe All Not Specified Rural

Countermeasure: Install centerline rumble strips on horizontal curves

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.83 17 4 Stars All All Not Specified Rural
1.16 -16 4 Stars All All Not Specified Rural
1.03 -3 4 Stars All All Not Specified Rural
1.04 -4 4 Stars All All Not Specified Rural
0.63 37 4 Stars All K,A,B,C Not Specified Rural
1.1 -10 4 Stars All K,A,B,C Not Specified Rural
0.79 21 3 Stars All K,A,B,C Not Specified Rural
0.94 6 4 Stars All K,A,B,C Not Specified Rural
0.48 52 3 Stars Head on,Sideswipe All Not Specified Rural
0.53 47 4 Stars Head on,Sideswipe All Not Specified Rural
1.46 -46 3 Stars Head on,Sideswipe All Not Specified Rural
0.53 47 5 Stars Head on,Sideswipe All Not Specified Rural

Countermeasure: Install centerline rumble strips on tangent sections

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.9 10 4 Stars All All Not Specified Rural
0.9 10 4 Stars All All Not Specified Rural
1.02 -2 4 Stars All All Not Specified Rural
0.92 8 4 Stars All All Not Specified Rural
0.82 18 4 Stars All K,A,B,C Not Specified Rural
0.78 22 4 Stars All K,A,B,C Not Specified Rural
1.1 -10 4 Stars All K,A,B,C Not Specified Rural
0.85 15 5 Stars All K,A,B,C Not Specified Rural
0.51 49 4 Stars Head on,Sideswipe All Not Specified Rural
0.57 43 3 Stars Head on,Sideswipe All Not Specified Rural
0.33 67 3 Stars Head on,Sideswipe All Not Specified Rural
0.51 49 5 Stars Head on,Sideswipe All Not Specified Rural

Countermeasure: Install edgeline rumble strips

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.71 29 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.75 25 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.75 25 3 Stars Run off road K,A,B,C Not Specified Rural
0.7 30 3 Stars Run off road K,A,B,C Not Specified Rural
0.58 42 3 Stars Run off road K,A,B,C Not Specified Rural
1.31 -31 3 Stars Run off road K,A,B,C Not Specified Rural
0.67 33 4 Stars Run off road K,A,B,C Not Specified Rural
1.08 -8 3 Stars Run off road K,A,B,C Not Specified Rural
0.61 39 4 Stars Run off road K,A,B,C Not Specified Rural
0.57 43 3 Stars Run off road K,A,B,C Not Specified Rural
0.86 14 3 Stars Run off road K,A,B,C Not Specified

Countermeasure: Install edgeline rumble strips on roadways with a shoulder width less than 5 feet

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.96 4 3 Stars Run off road K,A,B,C Not Specified Rural
1.1 -10 3 Stars Run off road K,A,B,C Not Specified Rural
0.53 47 3 Stars Run off road K,A,B,C Not Specified Rural
1.27 -27 3 Stars Run off road K,A,B,C Not Specified Rural

Countermeasure: Install edgeline rumble strips on roadways with a shoulder width of 5 feet or greater

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.75 25 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.34 66 4 Stars Run off road K,A,B,C Not Specified Rural
0.7 30 3 Stars Run off road K,A,B,C Not Specified Rural
0.46 54 3 Stars Run off road K,A,B,C Not Specified Rural
0.52 48 3 Stars Run off road K,A,B,C Not Specified Rural
0.57 43 4 Stars Run off road K,A,B,C Not Specified Rural
1.11 -11 3 Stars Run off road K,A,B,C Not Specified Rural

Category:Shoulder treatments

Countermeasure: Install shoulder rumble strips

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.99 1 4 Stars All All Principal Arterial Other Freeways and Expressways Urban
1.07 -7 4 Stars All All Principal Arterial Other Freeways and Expressways Rural
1.08 -8 4 Stars All All Principal Arterial Other Freeways and Expressways Rural
1 0 4 Stars All All Principal Arterial Other Freeways and Expressways Rural
1.18 -18 5 Stars All All Not Specified Rural
1.1 -10 4 Stars All All Not Specified Rural
1.22 -22 4 Stars All All Not Specified Rural
0.87 13 3 Stars All All Not Specified Rural
1.06 -6 4 Stars All All Not Specified Rural
1.14 -14 4 Stars All All Not Specified Rural
1.4 -40 4 Stars All All Not Specified Rural
0.76 24 4 Stars All All Not Specified Rural
0.84 16 4 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.93 7 4 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.94 6 4 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.87 13 4 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.9 10 4 Stars All K,A,B,C Not Specified Rural
0.78 22 3 Stars All K,A,B,C Not Specified Rural
0.95 5 4 Stars All K,A,B,C Not Specified Rural
0.6 40 3 Stars All K,A,B,C Not Specified Rural
0.92 8 4 Stars All K,A,B,C Not Specified Rural
1.05 -5 4 Stars All K,A,B,C Not Specified Rural
0.81 19 3 Stars All K,A,B,C Not Specified Rural
0.82 18 4 Stars All K,A,B,C Not Specified Rural
0.94 6 4 Stars Run off road All Principal Arterial Other Freeways and Expressways Urban
0.9 10 4 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.92 8 4 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.82 18 4 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
1.4 -40 5 Stars Run off road All Not Specified Rural
1.38 -38 3 Stars Run off road All Not Specified Rural
1.45 -45 4 Stars Run off road All Not Specified Rural
0.75 25 3 Stars Run off road All Not Specified Rural
0.84 16 5 Stars Run off road All Not Specified Rural
1.11 -11 4 Stars Run off road All Not Specified Rural
1.17 -17 3 Stars Run off road All Not Specified Rural
0.56 44 4 Stars Run off road All Not Specified Rural
0.93 7 4 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.83 17 5 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.84 16 4 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.77 23 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.97 3 4 Stars Run off road K,A,B,C Not Specified Rural
0.9 10 3 Stars Run off road K,A,B,C Not Specified Rural
1 0 4 Stars Run off road K,A,B,C Not Specified Rural
0.8 20 3 Stars Run off road K,A,B,C Not Specified Rural
0.64 36 5 Stars Run off road K,A,B,C Not Specified Rural
0.68 32 3 Stars Run off road K,A,B,C Not Specified Rural
0.55 45 3 Stars Run off road K,A,B,C Not Specified Rural
0.63 37 4 Stars Run off road K,A,B,C Not Specified Rural
0.96 4 3 Stars All All Principal Arterial Other Freeways and Expressways Urban
1.01 -1 3 Stars All All Principal Arterial Other Freeways and Expressways Rural
1.08 -8 3 Stars All All Principal Arterial Other Freeways and Expressways Rural
1.08 -8 3 Stars All All Principal Arterial Other Freeways and Expressways Rural
1.2 -20 4 Stars All All Not Specified Rural
1.16 -16 3 Stars All All Not Specified Rural
1.28 -28 3 Stars All All Not Specified Rural
0.81 19 3 Stars All All Not Specified Rural
0.86 14 3 Stars All All Not Specified Rural
0.96 4 3 Stars All All Not Specified Rural
0.83 17 3 Stars All All Not Specified Rural
0.76 24 3 Stars All All Not Specified Rural
0.91 9 3 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.92 8 3 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.97 3 3 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.88 12 3 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Rural
1.01 -1 3 Stars All K,A,B,C Not Specified Rural
1.07 -7 3 Stars All K,A,B,C Not Specified Rural
1.05 -5 3 Stars All K,A,B,C Not Specified Rural
0.58 42 3 Stars All K,A,B,C Not Specified Rural
0.72 28 4 Stars All K,A,B,C Not Specified Rural
0.87 13 3 Stars All K,A,B,C Not Specified Rural
0.6 40 3 Stars All K,A,B,C Not Specified Rural
0.84 16 3 Stars All K,A,B,C Not Specified Rural
0.96 4 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Urban
0.9 10 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.93 7 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.98 2 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
1.41 -41 4 Stars Run off road All Not Specified Rural
1.39 -39 3 Stars Run off road All Not Specified Rural
1.7 -70 3 Stars Run off road All Not Specified Rural
0.77 23 3 Stars Run off road All Not Specified Rural
0.71 29 4 Stars Run off road All Not Specified Rural
1.19 -19 3 Stars Run off road All Not Specified Rural
0.91 9 3 Stars Run off road All Not Specified Rural
0.55 45 3 Stars Run off road All Not Specified Rural
1.02 -2 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.86 14 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.88 12 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.87 13 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
1.05 -5 3 Stars Run off road K,A,B,C Not Specified Rural
1.12 -12 3 Stars Run off road K,A,B,C Not Specified Rural
1.19 -19 3 Stars Run off road K,A,B,C Not Specified Rural
0.67 33 2 Stars Run off road K,A,B,C Not Specified Rural
0.63 37 4 Stars Run off road K,A,B,C Not Specified Rural
1.04 -4 3 Stars Run off road K,A,B,C Not Specified Rural
0.41 59 3 Stars Run off road K,A,B,C Not Specified Rural
0.63 37 3 Stars Run off road K,A,B,C Not Specified Rural
0.95 5 3 Stars All All Principal Arterial Other Freeways and Expressways Urban
1.07 -7 3 Stars All All Principal Arterial Other Freeways and Expressways Rural
1.11 -11 3 Stars All All Principal Arterial Other Freeways and Expressways Rural
1.06 -6 3 Stars All All Principal Arterial Other Freeways and Expressways Rural
1.28 -28 4 Stars All All Not Specified Rural
1.17 -17 3 Stars All All Not Specified Rural
1.28 -28 3 Stars All All Not Specified Rural
0.74 26 3 Stars All All Not Specified Rural
0.94 6 3 Stars All All Not Specified Rural
1.18 -18 3 Stars All All Not Specified Rural
0.85 15 3 Stars All All Not Specified Rural
0.76 24 3 Stars All All Not Specified Rural
0.8 20 3 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.96 4 3 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.99 1 3 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.91 9 3 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Rural
1.05 -5 3 Stars All K,A,B,C Not Specified Rural
0.82 18 3 Stars All K,A,B,C Not Specified Rural
1.02 -2 3 Stars All K,A,B,C Not Specified Rural
0.56 44 3 Stars All K,A,B,C Not Specified Rural
0.86 14 3 Stars All K,A,B,C Not Specified Rural
1.07 -7 3 Stars All K,A,B,C Not Specified Rural
0.65 35 3 Stars All K,A,B,C Not Specified Rural
0.84 16 3 Stars All K,A,B,C Not Specified Rural
0.9 10 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Urban
0.9 10 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.94 6 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.87 13 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
1.66 -66 4 Stars Run off road All Not Specified Rural
1.34 -34 3 Stars Run off road All Not Specified Rural
1.67 -67 3 Stars Run off road All Not Specified Rural
0.77 23 3 Stars Run off road All Not Specified Rural
0.74 26 3 Stars Run off road All Not Specified Rural
1.12 -12 3 Stars Run off road All Not Specified Rural
0.94 6 3 Stars Run off road All Not Specified Rural
0.55 45 3 Stars Run off road All Not Specified Rural
0.9 10 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.82 18 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.86 14 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.78 22 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
1.15 -15 3 Stars Run off road K,A,B,C Not Specified Rural
0.85 15 3 Stars Run off road K,A,B,C Not Specified Rural
1.12 -12 3 Stars Run off road K,A,B,C Not Specified Rural
0.78 22 2 Stars Run off road K,A,B,C Not Specified Rural
0.6 40 4 Stars Run off road K,A,B,C Not Specified Rural
0.77 23 3 Stars Run off road K,A,B,C Not Specified Rural
0.43 57 3 Stars Run off road K,A,B,C Not Specified Rural
0.63 37 3 Stars Run off road K,A,B,C Not Specified Rural
1.02 -2 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.91 9 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.97 3 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
1.1 -10 3 Stars Run off road K,A,B,C Not Specified Rural
1.23 -23 3 Stars Run off road K,A,B,C Not Specified Rural
1.28 -28 3 Stars Run off road K,A,B,C Not Specified Rural
0.52 48 3 Stars Run off road K,A,B,C Not Specified Rural
0.53 47 4 Stars Run off road K,A,B,C Not Specified Rural
0.92 8 3 Stars Run off road K,A,B,C Not Specified Rural
0.58 42 3 Stars Run off road K,A,B,C Not Specified Rural
1.11 -11 3 Stars Run off road K,A,B,C Not Specified Rural
1 0 3 Stars Run off road K,A,B,C Not Specified
0.58 42 5 Stars Run off road,Truck related All Principal Arterial Other Freeways and Expressways Rural
0.58 42 4 Stars Run off road,Truck related All Principal Arterial Other Freeways and Expressways Rural
0.59 41 3 Stars Run off road,Truck related All Principal Arterial Other Freeways and Expressways Rural
1.83 -83 3 Stars Run off road,Truck related All Not Specified Rural
2.82 -182 3 Stars Run off road,Truck related All Not Specified Rural
2.39 -139 3 Stars Run off road,Truck related All Not Specified Rural
0.81 19 3 Stars Run off road,Truck related All Not Specified Rural
0.58 42 4 Stars Run off road,Truck related All Principal Arterial Other Freeways and Expressways Rural
0.59 41 3 Stars Run off road,Truck related All Principal Arterial Other Freeways and Expressways Rural
0.56 44 2 Stars Run off road,Truck related All Principal Arterial Other Freeways and Expressways Rural
0.54 46 4 Stars Run off road,Truck related All Principal Arterial Other Freeways and Expressways Rural
0.59 41 3 Stars Run off road,Truck related All Principal Arterial Other Freeways and Expressways Rural
0.56 44 2 Stars Run off road,Truck related All Principal Arterial Other Freeways and Expressways Rural
0.82 18 5 Stars Run off road,Wet road All Principal Arterial Other Freeways and Expressways Rural
0.77 23 4 Stars Run off road,Wet road All Principal Arterial Other Freeways and Expressways Rural
1.04 -4 3 Stars Run off road,Wet road All Principal Arterial Other Freeways and Expressways Rural
1.18 -18 4 Stars Run off road,Wet road All Not Specified Rural
1.5 -50 3 Stars Run off road,Wet road All Not Specified Rural
1.98 -98 3 Stars Run off road,Wet road All Not Specified Rural
0.7 30 3 Stars Run off road,Wet road All Not Specified Rural
0.89 11 3 Stars Run off road,Wet road All Principal Arterial Other Freeways and Expressways Rural
0.86 14 3 Stars Run off road,Wet road All Principal Arterial Other Freeways and Expressways Rural
1.03 -3 3 Stars Run off road,Wet road All Principal Arterial Other Freeways and Expressways Rural
1.05 -5 3 Stars Run off road,Wet road All Not Specified Rural
1.38 -38 3 Stars Run off road,Wet road All Not Specified Rural
2.35 -135 3 Stars Run off road,Wet road All Not Specified Rural
0.72 28 3 Stars Run off road,Wet road All Not Specified Rural
0.94 6 3 Stars Run off road,Wet road All Principal Arterial Other Freeways and Expressways Rural
0.85 15 3 Stars Run off road,Wet road All Principal Arterial Other Freeways and Expressways Rural
1.4 -40 3 Stars Run off road,Wet road All Principal Arterial Other Freeways and Expressways Rural
1.05 -5 3 Stars Run off road,Wet road All Not Specified Rural
1.75 -75 3 Stars Run off road,Wet road All Not Specified Rural
2.18 -118 3 Stars Run off road,Wet road All Not Specified Rural
0.72 28 3 Stars Run off road,Wet road All Not Specified Rural
0.73 27 5 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.74 26 4 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.67 33 4 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.89 11 4 Stars Run off road All Not Specified Rural
1.27 -27 3 Stars Run off road All Not Specified Rural
1.2 -20 3 Stars Run off road All Not Specified Rural
0.62 38 4 Stars Run off road All Not Specified Rural
0.77 23 4 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.82 18 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.72 28 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.76 24 3 Stars Run off road All Not Specified Rural
1.11 -11 3 Stars Run off road All Not Specified Rural
1.55 -55 3 Stars Run off road All Not Specified Rural
0.6 40 3 Stars Run off road All Not Specified Rural
0.78 22 4 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.79 21 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.7 30 3 Stars Run off road All Principal Arterial Other Freeways and Expressways Rural
0.7 30 4 Stars Run off road All Not Specified Rural
1.11 -11 3 Stars Run off road All Not Specified Rural
1.41 -41 3 Stars Run off road All Not Specified Rural
0.6 40 3 Stars Run off road All Not Specified Rural

Countermeasure: Install shoulder rumble strips on roadways with a shoulder width equal to 5 feet

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.68 32 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.97 3 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.52 48 3 Stars Run off road K,A,B,C Not Specified Rural
1.23 -23 3 Stars Run off road K,A,B,C Not Specified Rural
1.41 -41 3 Stars Run off road K,A,B,C Not Specified Rural
0.22 78 3 Stars Run off road K,A,B,C Not Specified Rural
0.46 54 4 Stars Run off road K,A,B,C Not Specified Rural
0.92 8 3 Stars Run off road K,A,B,C Not Specified Rural

Countermeasure: Install shoulder rumble strips on roadways with a shoulder width less than 5 feet

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.66 34 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.35 65 3 Stars Run off road K,A,B,C Not Specified Rural
1.21 -21 3 Stars Run off road K,A,B,C Not Specified Rural

Countermeasure: Install shoulder rumble strips with an offset of 0-8 inches relative to the edgeline

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.71 29 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.75 25 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.74 26 3 Stars Run off road K,A,B,C Not Specified Rural
0.71 29 3 Stars Run off road K,A,B,C Not Specified Rural
0.58 42 3 Stars Run off road K,A,B,C Not Specified Rural
0.67 33 4 Stars Run off road K,A,B,C Not Specified Rural
1.1 -10 3 Stars Run off road K,A,B,C Not Specified Rural

Countermeasure: Install shoulder rumble strips with an offset of 21+ inches relative to the edgeline

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.93 7 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
1.02 -2 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
1.16 -16 3 Stars Run off road K,A,B,C Not Specified Rural
0.74 26 3 Stars Run off road K,A,B,C Not Specified Rural
1.28 -28 3 Stars Run off road K,A,B,C Not Specified Rural
0.43 57 3 Stars Run off road K,A,B,C Not Specified Rural
1.58 -58 3 Stars Run off road K,A,B,C Not Specified Rural

Countermeasure: Install shoulder rumble strips with an offset of 9-20 inches relative to the edgeline

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
1.02 -2 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.9 10 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
0.49 51 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Rural
1.06 -6 3 Stars Run off road K,A,B,C Not Specified Rural
1.3 -30 3 Stars Run off road K,A,B,C Not Specified Rural
0.62 38 4 Stars Run off road K,A,B,C Not Specified Rural
0.79 21 3 Stars Run off road K,A,B,C Not Specified Rural

Countermeasure: Widen shoulder width to 5 feet or greater

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.64 36 3 Stars Run off road K,A,B,C Principal Arterial Other Freeways and Expressways Urban
0.47 53 3 Stars Run off road K,A,B,C Not Specified Rural
1.1 -10 3 Stars Run off road K,A,B,C Not Specified Rural
0.38 62 3 Stars Run off road K,A,B,C Not Specified Rural
0.73 27 3 Stars Run off road K,A,B,C Not Specified Rural
1.07 -7 3 Stars Run off road K,A,B,C Not Specified Rural