CMF / CRF Details

CMF ID: 1581

Install left-turn lane (signal has left-turn phase)

Description:

Prior Condition: No Prior Condition(s)

Category: Intersection geometry

Study: Signalized Intersections: Informational Guide, Rodegerdts et al., 2004

 
Star Quality Rating: 1 Star   [View score details]
Crash Modification Factor (CMF)
Value: 0.65
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value: 35   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type: All
Crash Severity: All
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type:
Traffic Volume:
Average Traffic Volume:
Time of Day:
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry:
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: CA
Country:
Type of Methodology Used: Non-regression cross-section
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-01-2009
Comments: