CMF / CRF Details
CMF ID: 9030
Install single luminaire at intersection
Description: A single luminaire is a safety treatment used to reduce nighttime crashes by making drivers aware of the presence of an intersection that may otherwise be difficult to see at night. For drivers on a stop-controlled approach, the lighting may provide additional time for the approaching driver to perceive the need to stop by increasing the visibility of features located at the site such as pavement markings and signs. For drivers on the uncontrolled approach, the lighting may provide an indication that drivers may be entering the roadway at that location and can improve the visibility of vehicles, bicyclists, and pedestrians located near the intersection. The luminaire may be pole-mounted near one corner of the intersection, or may be wire-mounted over the intersection.
Prior Condition: No lighting
Category: Highway lighting
Study: Advancing Innovating Intersection Safety Treatments for Two-Lane Rural Highways, Torbic et al., 2015
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 85 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.79 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.79 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 21 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 79 |
| Applicability | |
|---|---|
| Crash Type: | All,Nighttime |
| Crash Severity: | K (fatal),A (serious injury),B (minor injury),C (possible injury) |
| Roadway Types: | Not specified |
| Street Type: | |
| Minimum Number of Lanes: | 2 |
| Maximum Number of Lanes: | 2 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | Undivided |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Rural |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Night |
| If countermeasure is intersection-based | |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | 3-leg,4-leg |
| Traffic Control: | Stop-controlled |
| Major Road Traffic Volume: | Minimum of 200 to Maximum of 7300 Annual Average Daily Traffic (AADT) |
| Minor Road Traffic Volume: | Minimum of 30 to Maximum of 2000 Annual Average Daily Traffic (AADT) |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | |
| Municipality: | |
| State: | MN |
| Country: | |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 7 crashes before, 1 crashes after |
| Sample Size (sites): | 27 sites before, 27 sites after |
| Sample Size (site-years): | 135 site-years before, 43 site-years after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jan 17, 2018 |
| Comments: | |
