CMF / CRF Details

CMF ID: 2561

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: 35
Crash Modification Factor (CMF)
Value: 0.72
Adjusted Standard Error:
Unadjusted Standard Error: 0.2
Crash Reduction Factor (CRF)
Value: 28   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 20.2
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:
Country: Denmark
Type of Methodology Used: Simple before/after
Sample Size (crashes): 38 crashes before, 23 crashes after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Aug-11-2010
Comments: This CMF is for intersection crashes with signal more than 500 m away