CMF / CRF Details
Expand truck lane restrictions on 2-lane directional interstate segments (screened)
Countermeasure ID: 2722
Description: Expand truck lane restrictions on two-lane directional interstate segments so that trucks traveling 65 mph or below are restricted from the left lane instead of only trucks traveling 50 mph or below.
Prior Condition: Truck lane restriction sign posted prohibiting trucks traveling 50 mph or below from the left lane.
Category: Roadway
Study: Evaluation of Truck Lane Restrictions in Virginia: Phase II, Fontaine et al., 2009
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 30 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.98 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.12755 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 2 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 12.755 |
| Applicability | |
|---|---|
| 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 3926 to Maximum of 25279 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 17036 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 |
| Municipality: | |
| 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 |
| Comments: | |
