Study Details

Study Title: Traffic Safety Evaluation of Daytime and Nighttime Work Zones

Authors: Ullman et al.

Publication Date: 2008

Abstract:

Study Citation: Ullman, G., Finley, M., Bryden, J., Srinivasan, R., and Council, F., "Traffic Safety Evaluation of Daytime and Nighttime Work Zones", Final Report on NCHRP Project 17-30, Submitted July 2008.


CMFs Associated With This Study

Category: Work zone

Countermeasure: Active work with no lane closure (compared to no work zone)

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
2.26 -126 1 Star Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.45 -45 3 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.34 -34 3 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.19 -19 4 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.4 -40 3 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.13 -13 3 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.41 -41 3 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.17 -17 4 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.36 -36 1 Star Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.37 -37 3 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.23 -23 3 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.41 -41 4 Stars All O Principal Arterial Other Freeways and Expressways Not specified
2.04 -104 3 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.39 -39 4 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.67 -67 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.4 -40 5 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.64 -64 1 Star Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.39 -39 4 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.29 -29 3 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.32 -32 4 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.8 -80 3 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.3 -30 5 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.58 -58 4 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.31 -31 5 Stars All All Principal Arterial Other Freeways and Expressways Not specified

Countermeasure: Active work with temporary lane closure (compared to no work zone)

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
1.32 -32 3 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.6 -60 4 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.34 -34 3 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.12 -12 3 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.49 -49 4 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.26 -26 3 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.42 -42 4 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.46 -46 4 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.63 -63 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.9 -90 4 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.71 -71 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.34 -34 3 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.8 -80 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.87 -87 4 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.75 -75 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.81 -81 4 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.53 -53 4 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.77 -77 4 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.57 -57 4 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.26 -26 3 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.65 -65 4 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.65 -65 4 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.61 -61 4 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.66 -66 4 Stars All All Principal Arterial Other Freeways and Expressways Not specified

Countermeasure: No active with no lane closure (compared to no work zone)

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
1.05 -5 3 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.11 -11 3 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.14 -14 3 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
0.94 6 3 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.11 -11 3 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.05 -5 3 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.11 -11 4 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.02 -2 3 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.13 -13 3 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.27 -27 4 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.31 -31 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.1 -10 5 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.46 -46 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.23 -23 5 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.33 -33 5 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.2 -20 5 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.09 -9 3 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.21 -21 5 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.24 -24 4 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.04 -4 3 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.3 -30 4 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.16 -16 5 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.24 -24 5 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.13 -13 5 Stars All All Principal Arterial Other Freeways and Expressways Not specified