CMF / CRF Details

CMF ID: 3866

Change clear zone from greater than or equal to 8m to less than or equal to 2m

Description: Change clear zone from greater than or equal to 8m to less than or equal to 2m

Prior Condition:  road with clear zone greater than or equal to 8m

Category: Roadside

Study: Effect of Clear Zone Widths on Run-off-road Crash Outcomes, Jurewicz and Pyta, 2010

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:90
Crash Modification Factor (CMF)
Value:2.19
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:-119  (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:Run off road
Crash Severity:K (fatal),A (serious injury),B (minor injury),C (possible injury)
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:Undivided
Minimum Speed Limit:100
Maximum Speed Limit:100
Speed Unit:km/h
Speed Limit Comment:
Area Type:Rural
Traffic Volume:Minimum of 1200 to Maximum of 2400 Annual Average Daily Traffic (AADT)
Average Traffic Volume:
Time of Day:All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
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 2007
Municipality:Victoria
State:notusa
Country:Australia
Type of Methodology Used:Regression cross-section
Sample Size (crashes):217 crashes
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jun 04, 2012
Comments: