CMF / CRF Details
CMF ID: 8321
increase intersection illuminance from low (< 0.2 fc) to medium (≥ 0.2 fc and <1.1 fc)
Description: Increase intersection illuminance 13 from low (< 0.2 fc) to medium (≥ 0.2 fc and <1.1 fc)
Prior Condition: Signalized intersections with lower illuminance (<0.2 fc)
Category: Highway lighting
Study: Safety Effects of Street Illuminance at Urban Signalized Intersections in Florida, Wei et al., 2016
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 75 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.48 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 52 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability | |
|---|---|
| Crash Type: | Nighttime |
| Crash Severity: | All |
| Roadway Types: | Not specified |
| 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: | Urban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Night |
| If countermeasure is intersection-based | |
| Intersection Type: | |
| Intersection Geometry: | 4-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | Minimum of 5167 to Maximum of 67508 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | Minimum of 1300 to Maximum of 56387 Annual Average Daily Traffic (AADT) |
| Average Major Road Volume : | 29733 Annual Average Daily Traffic (AADT) |
| Average Minor Road Volume : | 12457 Annual Average Daily Traffic (AADT) |
| Development Details | |
|---|---|
| Date Range of Data Used: | 2010 to 2013 |
| Municipality: | Tampa |
| State: | FL |
| Country: | |
| Type of Methodology Used: | Regression cross-section |
| Sample Size (crashes): | 1234 crashes |
| Sample Size (sites): | 91 sites |
| Sample Size (site-years): | 364 site-years |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jan 17, 2017 |
| Comments: | |
