CMF / CRF Details
CMF ID: 2371
Partial plus to partial interchange lighting
Description: reducing illumination from partial plus interchange lighting to partial interchange lighting. Partial lighting describes interchange lighting where only the critical points (gore areas, terminal on surface streets, merge points, curbs, piers, and abutment
Prior Condition: Partial plus 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: | 105 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.6 |
| Adjusted Standard Error: | 0.141 |
| Unadjusted Standard Error: | 0.141 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 40 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | 14.1 |
| Unadjusted Standard Error: | 14.1 |
| 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): | 22 crashes after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jan 01, 1970 |
| Comments: | |
