CMF / CRF Details

CMF ID: 1672

Install flashing beacons as advance warning

Description:

Prior Condition:  No Prior Condition(s)

Category: Intersection traffic control

Study: Older Drivers at a Crossroads, Morena et al., 2007

 
Star Quality Rating:1 Star  [View score details]
Rating Points Total:25
Crash Modification Factor (CMF)
Value:0.64
Adjusted Standard Error:
Unadjusted Standard Error:0.138
Crash Reduction Factor (CRF)
Value:36  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:13.8
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:All
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:
Municipality:
State:MD
Country:usa
Type of Methodology Used:Simple before/after
Sample Size (crashes):92 crashes before, 28 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 01, 2009
Comments: