CMF / CRF Details

CMF ID: 2519

Replace TWLTL with raised median

Description:

Prior Condition: Two way left turn lane (TWLTL)

Category: Access management

Study: Modeling and Evaluating the Safety Impacts of Access Management (AM) Features in the Las Vegas Valley, Mauga and Kaseko, 2010

 
Star Quality Rating: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.79
Adjusted Standard Error:
Unadjusted Standard Error: 0.0721
Crash Reduction Factor (CRF)
Value: 21   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 7.21
Applicability
Crash Type: Angle,Fixed object,Head on,Rear end,Run off road,Sideswipe,Single vehicle
Crash Severity: A (serious injury),B (minor injury),C (possible injury)
Roadway Types: All
Number of Lanes:
Road Division Type:
Speed Limit: 30-45
Area Type: Urban
Traffic Volume: Minimum of 4883 to Maximum of 96080
Average Traffic Volume:
Time of Day: Not specified
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: 2002 to 2006
Municipality:
State: NV
Country:
Type of Methodology Used: Regression cross-section
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Aug-11-2010
Comments: