CMF / CRF Details

CMF ID: 2846

Install lighting

Description:

Prior Condition:  Unlit road

Category: Highway lighting

Study: Effects of road lighting: An analysis based on Dutch accident statistics 1987-2006, Wanvik, 2009

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:90
Crash Modification Factor (CMF)
Value:0.69
Adjusted Standard Error:
Unadjusted Standard Error:0.0255
Crash Reduction Factor (CRF)
Value:31  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:2.55
Applicability
Crash Type:Not specified
Crash Severity:A (serious injury),B (minor injury),C (possible injury)
Roadway Types:All
Street Type:
Minimum Number of Lanes:
Maximum Number of Lanes:
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:All
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:All
Traffic Volume:
Average Traffic Volume:
Time of Day:
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:1987 to 2006
Municipality:
State:notusa
Country:Netherlands
Type of Methodology Used:Non-regression cross-section
Sample Size (crashes):284313 crashes
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Mar 21, 2011
Comments:Crash type is twilight crashes. The authors of this study also experimented with producing additional CMFs from the same dataset using alternative, less reliable methods. Since this did not add new knowledge to this topic, these CMFs were not included in the Clearinghouse.