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