CMF / CRF Details

CMF ID: 3935

Install raised median

Description:

Prior Condition: Unknown

Category: Access management

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: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.86
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value: 14   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type: All
Crash Severity: All
Roadway Types: Principal Arterial
Number of Lanes: 2
Road Division Type:
Speed Limit: <45
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): 75 crashes before, 72 crashes after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jun-04-2012
Comments: