CMF / CRF Details

CMF ID: 8200

Provide a raised median

Description:

Prior Condition: Median type grass, single or double-yellow line, painted double double yellow median, two-way left-turn lane, auxiliary left-turn lane, or median opening

Category: Access management

Study: Safety Analysis of Driveway Characteristics along Major Urban Arterial Corridors in South Carolina, Stokes et al., 2016

 
Star Quality Rating: 3 Stars   [View score details]
Rating Points Total: 85
Crash Modification Factor (CMF)
Value: 0.49
Adjusted Standard Error:
Unadjusted Standard Error: 0.16
Crash Reduction Factor (CRF)
Value: 51   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 16
Applicability
Crash Type: Other
Crash Severity: All
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: All
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type: Urban
Traffic Volume:
Average Traffic Volume:
Time of Day: Not specified
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: 2012 to 2012
Municipality:
State: SC
Country: USA
Type of Methodology Used: Regression cross-section
Sample Size (sites): 3774 sites
Sample Size (site-years): 3774 site-years
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jan-17-2017
Comments: Applies to driveway-related crashes. Rectangular buffer areas used, extending across all travel lanes for full access driveways and to the roadway centerline for right-in right-out driveways.