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 |
|---|
| 1.45 | -45 |  | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.34 | -34 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.19 | -19 |  | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.4 | -40 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.13 | -13 | | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.41 | -41 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.17 | -17 | | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.36 | -36 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.37 | -37 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 2.04 | -104 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.23 | -23 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.41 | -41 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 2.26 | -126 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.39 | -39 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.67 | -67 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.4 | -40 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.64 | -64 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.39 | -39 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.29 | -29 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.32 | -32 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.8 | -80 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.3 | -30 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.58 | -58 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.31 | -31 | | 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 |
|---|
| 1.8 | -80 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.87 | -87 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.75 | -75 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.81 | -81 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.53 | -53 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.77 | -77 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.57 | -57 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.26 | -26 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.65 | -65 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.65 | -65 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.61 | -61 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.66 | -66 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.9 | -90 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.32 | -32 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.6 | -60 | | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.34 | -34 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.12 | -12 | | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.49 | -49 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.26 | -26 | | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.42 | -42 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.46 | -46 | | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.63 | -63 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.71 | -71 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.34 | -34 | | All | O | 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 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.11 | -11 | | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.14 | -14 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 0.94 | 6 | | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.11 | -11 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.05 | -5 | | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.11 | -11 | | Nighttime | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.02 | -2 | | All | A,B,C | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.13 | -13 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.27 | -27 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.31 | -31 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.1 | -10 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.46 | -46 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.23 | -23 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.33 | -33 | | Nighttime | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.2 | -20 | | All | O | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.09 | -9 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.21 | -21 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.24 | -24 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.04 | -4 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.3 | -30 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.16 | -16 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.24 | -24 | | Nighttime | All | Principal Arterial Other Freeways and Expressways | Not specified |
| 1.13 | -13 | | All | All | Principal Arterial Other Freeways and Expressways | Not specified |
