CMF / CRF Details
CMF ID: 8186
Installation of fixed speed cameras
Description: Installation of fixed speed cameras on arterials limited access freeways
Prior Condition: No speed camera present
Category: Speed management
Study: Safety effects of fixed speed cameras - An empirical Bayes evaluation, Hoye, 2015
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 80 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.76 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.245 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 24 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 24.5 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | K (fatal),A (serious injury) |
| Roadway Types: | Not specified |
| 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: | 50 |
| Maximum Speed Limit: | 90 |
| Speed Unit: | km/h |
| Speed Limit Comment: | |
| Area Type: | Rural |
| Traffic Volume: | |
| Average Traffic Volume: | 8419 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: | 1997 to 2013 |
| Municipality: | |
| State: | notusa |
| Country: | Norway |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 101 crashes before, 42 crashes after |
| Sample Size (sites): | 130 sites before, 130 sites after |
| Sample Size (site-years): | 390 site-years before, 390 site-years after |
| Sample Size (miles): | 124.4 miles before, 124.4 miles after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Nov 10, 2016 |
| Comments: | Medium section: 100m upstream and 1km downstream of camera location |
