CMF / CRF Details

CMF ID: 3937

Install guiderail

Description: None

Prior Condition:  Unknown

Category: Roadside

Study: A comparative Full Bayesian before-and-after anaylsis and application to urban road safety countermeasures in New Jersey, Yanmaz-Tuzel and Ozbay, 2010

 
Star Quality Rating:2 Stars  [View score details]
Rating Points Total:45
Crash Modification Factor (CMF)
Value:0.85
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:15  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:All
Crash Severity:All
Roadway Types:Principal Arterial
Street Type:
Minimum Number of Lanes:2
Maximum Number of Lanes:2
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:
Minimum Speed Limit:
Maximum Speed Limit:45
Speed Unit:mph
Speed Limit Comment:< = 45 mph
Area Type:Urban
Traffic Volume:
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:2001 to 2006
Municipality:
State:NJ
Country:
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):21 crashes before, 17 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jun 04, 2012
Comments: