CMF / CRF Details

CMF ID: 2556

Convert from yield signal control to signalized control

Description:

Prior Condition:  yield control

Category: Intersection traffic control

Study: Safety Effects of Intersection Signalization: a Before-After Study, Jensen, 2010

 
Star Quality Rating:2 Stars  [View score details]
Rating Points Total:70
Crash Modification Factor (CMF)
Value:0.61
Adjusted Standard Error:
Unadjusted Standard Error:0.06
Crash Reduction Factor (CRF)
Value:39  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:6.4
Applicability
Crash Type:All
Crash Severity:All
Roadway Types:Not Specified
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:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Urban
Traffic Volume:
Average Traffic Volume:
Time of Day:All
If countermeasure is intersection-based
Intersection Type:Roadway/roadway (not interchange related)
Intersection Geometry:4-leg
Traffic Control:Signalized
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:1976 to 2004
Municipality:Copenhagen
State:notusa
Country:Denmark
Type of Methodology Used:Simple before/after
Sample Size (crashes):297 crashes before, 149 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Aug 11, 2010
Comments:This CMF is for intersection crashes