CMF / CRF Details

CMF ID: 8084

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: 95
Crash Modification Factor (CMF)
Value: 0.575
Adjusted Standard Error:
Unadjusted Standard Error: 0.039
Crash Reduction Factor (CRF)
Value: 42.5   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 3.9
Applicability
Crash Type: Angle,Left turn
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: Angle & left-turn crashes months 1-9 after signalization