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 4 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.45 -45 4 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.34 -34 4 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.19 -19 5 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.4 -40 4 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.13 -13 5 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.41 -41 4 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.17 -17 5 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.36 -36 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.37 -37 4 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.23 -23 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.41 -41 5 Stars All O Principal Arterial Other Freeways and Expressways Not specified
2.04 -104 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.39 -39 5 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 4 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.39 -39 5 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.29 -29 4 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.32 -32 5 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.8 -80 4 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 4 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 4 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.12 -12 4 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.49 -49 5 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.26 -26 4 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.42 -42 5 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.46 -46 5 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 5 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.71 -71 5 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.34 -34 4 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.8 -80 5 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 5 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.81 -81 5 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 5 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.57 -57 5 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.26 -26 4 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.65 -65 5 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 5 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.66 -66 5 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 4 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.11 -11 4 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.14 -14 5 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
0.94 6 4 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
1.05 -5 4 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.11 -11 5 Stars Nighttime A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.02 -2 4 Stars All A,B,C Principal Arterial Other Freeways and Expressways Not specified
1.13 -13 4 Stars Nighttime O Principal Arterial Other Freeways and Expressways Not specified
1.27 -27 5 Stars All O Principal Arterial Other Freeways and Expressways Not specified
1.31 -31 5 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 5 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 4 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 5 Stars Nighttime All Principal Arterial Other Freeways and Expressways Not specified
1.04 -4 4 Stars All All Principal Arterial Other Freeways and Expressways Not specified
1.3 -30 5 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