CMF / CRF Details
CMF ID: 1933
Implement truck lane restrictions on multilane freeways (>10000 vpdpl)
Description: Commercial vehicles (trucks) are prohibited from the left-most lane on interstates with two or more lanes when the posted speed limit is 65 mph. In the 8th District (VA suburbs of DC) and on I-81, commercial vehicles are prohibited from the left-most lane
Prior Condition: No truck restrictions
Category: Roadway
Study: Safety Impact of Truck Lane Restrictions on Multilane Freeways, Fontaine et al., 2009
Star Quality Rating: | [View score details] |
Rating Points Total: | 110 |
Crash Modification Factor (CMF) | |
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Value: | 1.34 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.051 |
Crash Reduction Factor (CRF) | |
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Value: | -34 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 5.1 |
Applicability | |
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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: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | |
Traffic Volume: | Minimum of 17049 to Maximum of 74079 |
Average Traffic Volume: | |
Time of Day: | All |
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 | |
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Date Range of Data Used: | 2000 to 2005 |
Municipality: | |
State: | VA |
Country: | |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (sites): | 11 sites after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Dec 01, 2009 |
Comments: |