CMF / CRF Details

CMF ID: 5186

Install TWLTL (two-way left turn lane) on two lane road

Description:

Prior Condition: Absence of TWLTL; driveway density greater than or equal to five driveways per mile.

Category: Roadway

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

 
Star Quality Rating: Cannot Be Rated (HSM)
Crash Modification Factor (CMF)
Value: Equation
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type: All
Crash Severity: All
Roadway Types: Minor Arterial
Number of Lanes: 2
Road Division Type:
Speed Limit:
Area Type: Rural
Traffic Volume:
Average Traffic Volume:
Time of Day:
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:
Municipality:
State:
Country:
Type of Methodology Used: Not specified
Other Details
Included in Highway Safety Manual? Yes
Date Added to Clearinghouse:
Comments: To determine the CMF for changing the condition, divide the "new" condition CMF by the "existing" condition CMF.