CMF / CRF Details

CMF ID: 10301

Convert a conventional signalized intersection to a continuous flow intersection (CFI)

Description:

Prior Condition: Conventional signalized intersection

Category: Intersection geometry

Study: Development of Performance Matrices for Evaluating Innovative Intersections and Interchanges, Zlatkovic, M., 2015

 
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Crash Modification Factor (CMF)
Value: 0.877
Adjusted Standard Error:
Unadjusted Standard Error: 0.045
Crash Reduction Factor (CRF)
Value: 12.3   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 4.5
Applicability
Crash Type: All
Crash Severity: All
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type: Not specified
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: Signalized
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 2008 to 2013
Municipality:
State: UT
Country:
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 1050 crashes before, 830 crashes after
Sample Size (sites): 7 sites before, 7 sites after
Sample Size (site-years): 20 site-years before, 28 site-years after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-23-2020
Comments: