CMF / CRF Details

CMF ID: 5530

Install a traffic signal


Prior Condition: Stop controlled intersection

Category: Intersection traffic control

Study: Comparison of Safety Evaluation Approaches for Intersection Signalization in Florida, Wang and Abdel-Aty, 2014

Star Quality Rating: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 1.184
Adjusted Standard Error:
Unadjusted Standard Error: 0.205
Crash Reduction Factor (CRF)
Value: -18.4   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 20.5
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes: 2 to 4
Road Division Type:
Speed Limit:
Area Type: Not specified
Traffic Volume:
Average Traffic Volume:
Time of Day: Not specified
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry: 3-leg,4-leg
Traffic Control: Stop-controlled
Major Road Traffic Volume: Minimum of 20000 to Maximum of 25000 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 2004 to 2009
State: FL
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Aug-12-2014
Comments: CMF applies to intersections with major road AADT 20,000-25,000