CMF / CRF Details

CMF ID: 8205

Change driveway class to high turnover/major

Description: Driveway class consists of turnover rate. Single dwelling units have a lower turnover rate and big box retail has a high rate.

Prior Condition: Lower driveway class (i.e., single dwelling unit, subdivision/apts, low turnover small business)

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]
Crash Modification Factor (CMF)
Value: 2.17
Adjusted Standard Error:
Unadjusted Standard Error: 0.2
Crash Reduction Factor (CRF)
Value: -117 (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 20
Applicability
Crash Type: Other
Crash Severity: All
Roadway Types: Not specified
Number of Lanes:
Road Division Type: All
Speed Limit:
Area Type: Urban
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:
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. A rectangular buffer area is used to identify driveway-related crashes. CMF applies to high-turnover driveways (i.e., fast food, gas station, drive-thru bank).

[View the Full Study Details]

The information contained in the Crash Modification Factors (CMF) Clearinghouse is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for the use of the information contained in the CMF Clearinghouse. The information contained in the CMF Clearinghouse does not constitute a standard, specification, or regulation, nor is it a substitute for sound engineering judgment.