CMF / CRF Details
CMF ID: 2363
Full to partial interchange lighting
Description: Reducing illumination from full to partial interchange lighting
Prior Condition: Full interchange lighting.
Category: Highway lighting
Study: Safety Effects of Reducing Freeway Illumination for Energy Conservation, Monsere and Fischer, 2008
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 110 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.886 |
| Adjusted Standard Error: | 0.06 |
| Unadjusted Standard Error: | 0.06 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 11.4 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | 6 |
| Unadjusted Standard Error: | 6 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | A (serious injury),B (minor injury),C (possible injury) |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
| Street Type: | |
| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Suburban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Night |
| If countermeasure is intersection-based | |
| Intersection Type: | Roadway/roadway (interchange ramp terminal) |
| Intersection Geometry: | |
| Traffic Control: | Uncontrolled |
| Major Road Traffic Volume: | |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 1995 to 2005 |
| Municipality: | Portland |
| State: | OR |
| Country: | |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 339 crashes after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jan 01, 1970 |
| Comments: | |
