| Applicability |
|---|
| Crash Type: | Multiple vehicle |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Interstate |
| Street Type: | |
| Minimum Number of Lanes: | 6 |
| Maximum Number of Lanes: | 8 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Divided by Median |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Not specified |
| Traffic Volume: | Minimum of 133000 to Maximum of 184000 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 158746 Annual Average Daily Traffic (AADT) |
| 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 |
|---|
| Date Range of Data Used: | 2011 to 2016 |
| Municipality: | |
| State: | VA |
| Country: | United States |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 744 crashes before, 139 crashes after |
| Sample Size (sites): | 3 sites before, 3 sites after |
| Sample Size (site-years): | 12 site-years before, 3 site-years after |
| Sample Size (miles): | 7.2 miles before, 7.2 miles after |
| Sample Size (miles): | 28.8 mile-years before, 7.2 mile-years after |
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