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
|
|
Nighttime |
A,B,C |
Principal Arterial Other Freeways and Expressways |
Not specified |
|
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 |
|
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 |
|
2.04
|
-104
|
|
Nighttime |
O |
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 |
|
1.32
|
-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 |
|
1.9
|
-90
|
|
All |
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 |
|
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 |
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 |
