CMF / CRF Details

CMF ID: 5622

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

Description:

Prior Condition: Roadways with no workzone

Category: Work zone

Study: Estimating the Impact of Work Zones on Highway Safety, Ozturk et al., 2014

 
Star Quality Rating: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 1.168
Adjusted Standard Error:
Unadjusted Standard Error: 0.023
Crash Reduction Factor (CRF)
Value: -16.8   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 2.3
Applicability
Crash Type: All
Crash Severity: All
Roadway Types: All
Number of Lanes: 2 to 4
Road Division Type:
Speed Limit: 35-65
Area Type: All
Traffic Volume: Minimum of 8396 to Maximum of 70447 Annual Average Daily Traffic (AADT)
Average Traffic Volume: 33974 Annual Average Daily Traffic (AADT)
Time of Day: All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 2001 to 2011
Municipality:
State: NJ
Country:
Type of Methodology Used: Regression cross-section
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Aug-12-2014
Comments: CMF is based on the comparison of monthly crash counts between pre- and during work zone conditions