CMF / CRF Details

CMF ID: 7563

Change horizontal alignment from R1 to R2

Description: Change horizontal alignment radius from R1 to R2 (in meters). Compared to a tangent section where the radius can be considered infinity.

Prior Condition: No Prior Condition(s)

Category: Alignment

Study: Development of Crash Modification Factors of Alignment Elements and Safety Countermeasures for Korean Freeways, Choi et al., 2015

 
Star Quality Rating: 4 Stars   [View score details]
Rating Points Total: 115
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: All
Roadway Types: Principal Arterial Other Freeways and Expressways
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:
Traffic Volume: Minimum of 4263 to Maximum of 57699 Annual Average Daily Traffic (AADT)
Average Traffic Volume:
Time of Day:
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 2005
Municipality:
State:
Country: Korea
Type of Methodology Used: Regression cross-section
Sample Size (sites): 1366 sites
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Nov-01-2015
Comments: