CMF / CRF Details

CMF ID: 8080

Install a traffic signal

Description:

Prior Condition:  Stop controlled intersection

Category: Intersection traffic control

Study: Estimating safety performance trends over time for treatments at intersections in Florida, Wang et al., 2015

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:80
Crash Modification Factor (CMF)
Value:1.258
Adjusted Standard Error:
Unadjusted Standard Error:0.182
Crash Reduction Factor (CRF)
Value:-25.8  (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:18.2
Applicability
Crash Type:Rear end
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:
Traffic Volume:
Average Traffic Volume:
Time of Day:
If countermeasure is intersection-based
Intersection Type:Roadway/roadway (not interchange related)
Intersection Geometry:Not specified
Traffic Control:Stop-controlled
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:2003 to 2013
Municipality:
State:FL
Country:
Type of Methodology Used:Before/after using comparison group
Sample Size (sites):32 sites before, 32 sites after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Nov 10, 2016
Comments:Rear-end crashes months 1-9 after signalization