CMF / CRF Details

CMF ID: 1628

Convert four-leg intersection into two three-leg intersections

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]
Rating Points Total:20
Crash Modification Factor (CMF)
Value:0.43
Adjusted Standard Error:
Unadjusted Standard Error:0.13
Crash Reduction Factor (CRF)
Value:57  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:13
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:All
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:
Major Road Traffic Volume:Minimum of <10000 to Maximum of >20000
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:1969 to 1973
Municipality:
State:VA
Country:usa
Type of Methodology Used:Non-regression cross-section
Sample Size (crashes):130 crashes
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 01, 2009
Comments:Countermeasure name has been slightly modified for consistency across Clearinghouse