CMF / CRF Details
CMF ID: 7703
Section Control
Description:
A section control site consists of a stretch of road between two speed cameras (four speed cameras at sites with bidirectional section control), both of which take pictures of all passing vehicles in one direction with automatic license plate recognition. Average speed is calculated from the times the first and second cameras are passed.
Prior Condition: Roadways without section control
Category: Advanced technology and ITS
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.88 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.156 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | 12 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 15.56 |
| Applicability |
|---|
| Crash Type: | All |
| Crash Severity: | A (serious injury),B (minor injury),C (possible injury) |
| Roadway Types: | All |
| 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: | Undivided |
| Minimum Speed Limit: | 80 |
| Maximum Speed Limit: | 90 |
| Speed Unit: | km/h |
| Speed Limit Comment: | |
| Area Type: | Rural |
| Traffic Volume: | Minimum of 1904 to Maximum of 9205 Annual Average Daily Traffic (AADT) |
| Average Traffic Volume: | 4948 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: | 2007 to 2013 |
| Municipality: | |
| State: | notusa |
| Country: | Norway |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 21 crashes before, 12 crashes after |
| Sample Size (sites): | 6 sites before, 6 sites after |
| Sample Size (site-years): | 18 site-years before, 14 site-years after |
| Sample Size (miles): | 27 miles before, 27 miles after |
| Sample Size (miles): | 81 mile-years before, 62 mile-years after |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Mar 08, 2016 |
| Comments: | All the sites were outside urban areas on open roads. |
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