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: 2 Stars   [View score details]
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
Number of Lanes:
Road Division Type:
Speed Limit:
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