CMF / CRF Details
CMF ID: 6147
Installation of fixed speed cameras
Description:
Installation of fixed speed cameras on arterials limited access freeways
Prior Condition: No Speed Cameras Present
Category: Speed management
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.89 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.072 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | 11 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 7.2 |
| Applicability |
|---|
| Crash Type: | All |
| Crash Severity: | K (fatal),A (serious injury),B (minor injury),C (possible injury) |
| Roadway Types: | Not specified |
| Street Type: | |
| Minimum Number of Lanes: | 1 |
| Maximum Number of Lanes: | 2 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | 30 |
| Maximum Speed Limit: | 55 |
| Speed Unit: | km/h |
| Speed Limit Comment: | 50 - 90 km/h converted to mph |
| Area Type: | Urban |
| Traffic Volume: | |
| 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 |
|---|
| Date Range of Data Used: | 2000 to 2008 |
| Municipality: | Flanders |
| State: | notusa |
| Country: | Belgium |
| Type of Methodology Used: | Before/after using comparison group |
| Sample Size (sites): | 26 sites before, 26 sites after |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Mar 11, 2015 |
| Comments: | This CMF addresses all injury crashes within 500 meters of speed camera location, regardless of direction. The number of crashes in the after period were not reported in this study, however, they have been recorded as 300 to give 10 points as a beneift of doubt for one or more of the following: (1) number of miles/sites in the reference/treatment group, (2) number of crashes in the references/treatment group, (3) reporting AADTs for the aggregate dataset but not for the disaggragate dataset used for CMF development. |
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