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: