CMF / CRF Details

CMF ID: 4577

Change left-turn phase to protected phasing on one or more approaches

Description: Change from permissive, permissive/protected, or protected/permissive to protected phasing on one or more approaches at urban signalized intersection

Prior Condition: Permissive, permissive/protected, or protected/permissive phasing.

Category: Intersection traffic control

Study: Highway Safety Manual, 1st Edition, Various, 2010

 
Star Quality Rating: 3 Stars
Crash Modification Factor (CMF)
Value: 0.94
Adjusted Standard Error:
Unadjusted Standard Error: 0.1
Crash Reduction Factor (CRF)
Value: 6   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 10
Applicability
Crash Type: All
Crash Severity: All
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type: Urban
Traffic Volume:
Average Traffic Volume:
Time of Day:
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry: 3-leg,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:
Municipality:
State: No state(s) chosen.
Country:
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Other Details
Included in Highway Safety Manual? Yes
Date Added to Clearinghouse:
Comments: