CMF / CRF Details

CMF ID: 8207

Signalize driveway

Description: Driveway is unsignalized

Prior Condition: Unsignalized driveway

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: 3.98
Adjusted Standard Error:
Unadjusted Standard Error: 0.73
Crash Reduction Factor (CRF)
Value: -298   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 73
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:
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. This CMF does not account for the fact that signalized driveways in the study had higher traffic volumes. A rectangular buffer area is used to identify driveway-related crashes.