CMF / CRF Details

CMF ID: 409

Transverse bar pavement marking at roundabout approaches

Description:

Prior Condition: No Prior Condition(s)

Category: Speed management

Study: A Review of Two Innovative Pavement Patterns that Have Been Developed to Reduce Traffic Speeds and Crashes, Griffin and Reinhardt, 1996

 
Star Quality Rating: 2 Stars   [View score details]
Rating Points Total: 65
Crash Modification Factor (CMF)
Value: 0.48
Adjusted Standard Error: 0.24
Unadjusted Standard Error: 0.11
Crash Reduction Factor (CRF)
Value: 52   (This value indicates a decrease in crashes)
Adjusted Standard Error: 24
Unadjusted Standard Error: 11
Applicability
Crash Type: Speed related
Crash Severity:
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: Not specified
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: Roundabout
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:
Country:
Type of Methodology Used: Simple before/after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-01-2009
Comments: