CMF / CRF Details
CMF ID: 2842
Installation of fixed speed cameras
Description: Installation of fixed speed cameras on arterials limited access freeways
Prior Condition: Arterial roadway without speed cameras
Category: Speed management
Study: Effectiveness of speed enforcement through fixed speed cameras: a time series study, Novoa 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: | 0.1327 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 2 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 13.27 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other |
| Street Type: | |
| Minimum Number of Lanes: | 2 |
| Maximum Number of Lanes: | 4 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | All |
| Minimum Speed Limit: | 31 |
| Maximum Speed Limit: | 31 |
| Speed Unit: | mph |
| Speed Limit Comment: | 50 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: | 2002 to 2007 |
| Municipality: | Barcelona |
| State: | notusa |
| Country: | Spain |
| Type of Methodology Used: | Simple before/after |
| Sample Size (site-years): | 4 site-years before, 4 site-years after |
