Illumination for Intersections
The recommended lighting levels for intersections of continuously lit roadways are in the table below. They are based on the functional classifications of the intersecting roadways and level of pedestrian use. The values are taken from Table 8 in ANSI/IES RP-8-14, Roadway Lighting.
The functional classifications of roadways are based on the Institute of Transportation Engineers (ITE) Guidelines for Residential Subdivision Street Design:
- Major - over 3,500 average daily traffic (ADT)
- Collector - 1,500 to 3,500 ADT
- Local - 100 to 1,500 ADT
Functional Classification | Average Maintained Illumination at Pavement by Pedestrian Area Classification in fc | Uniformity E avg /Emin | ||
|---|---|---|---|---|
High | Medium | Low | ||
Major/Major | 3.4 | 2.6 | 1.8 | 3.0 |
Major/Collector | 2.9 | 2.2 | 1.5 | 3.0 |
Major/Local | 2.6 | 2.0 | 1.3 | 3.0 |
Collector/Collector | 2.4 | 1.8 | 1.5 | 4.0 |
Collector/Local | 2.1 | 1.6 | 1.0 | 4.0 |
Local/Local | 1.8 | 1.4 | 0.8 | 6.0 |