CMF / CRF Details

CMF ID: 2721

Implement strict truck lane restrictions on 2-lane directional interstate segments (screened)

Description: Restrict trucks traveling 65 mph or less from the left lane of two-lane directional interstate segments

Prior Condition: No truck lane restriction signs posted

Category: Roadway

Study: Evaluation of Truck Lane Restrictions in Virginia: Phase II, Fontaine et al., 2009

Star Quality Rating: 1 Star   [View score details]
Rating Points Total: 25
Crash Modification Factor (CMF)
Value: 1.23
Adjusted Standard Error:
Unadjusted Standard Error: 0.321
Crash Reduction Factor (CRF)
Value: -23   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 32.1
Crash Type: Truck related
Crash Severity: All
Roadway Types: Principal Arterial Interstate
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:
Minimum Speed Limit: 65
Maximum Speed Limit: 65
Speed Unit: mph
Speed Limit Comment:
Area Type: Not specified
Traffic Volume: Minimum of 3849 to Maximum of 9663 Annual Average Daily Traffic (AADT)
Average Traffic Volume: 21475 Annual Average Daily Traffic (AADT)
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: 2001 to 2008
State: VA
Country: USA
Type of Methodology Used: Simple before/after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-21-2011