CMF / CRF Details

CMF ID: 3260

Change vertical grade

Description: change vertical grade

Prior Condition:  Rural two-lane road with flat or rolling terrain with a mean speed of X

Category: Alignment

Study: Safety Performance Functions for Low-Volume Roads, Acqua and Russo, 2010

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:90
Crash Modification Factor (CMF)
Value:Equation
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:Equation
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:All
Crash Severity:K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types:Not Specified
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:Undivided
Minimum Speed Limit:35
Maximum Speed Limit:35
Speed Unit:mph
Speed Limit Comment:
Area Type:Rural
Traffic Volume:Maximum of 1000 Average Daily Traffic (ADT)
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 2005
Municipality:
State:notusa
Country:Italy
Type of Methodology Used:Regression cross-section
Sample Size (crashes):59 crashes
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jul 15, 2011
Comments: