IES has released the latest version of its ANSI/IES RP-8-21: Roadway and Parking Facility Lighting Standard. This standard covers all aspects of roadway lighting, including streets and roadways, parking lots, intersections, toll plazas, tunnels, and work zones. Notably, RP-8-21 is a compilation of numerous previously distinct IES American National Standards.
As discussed in the Introduction of RP-8, lighting design criteria need to carefully consider the following goals:
- Improve motorist visual quality
- Provide quality light and increased contrast for seeing hazards Illuminate conflict areas
- Minimize environmental impacts of light at night
- Employ lighting systems that are easily maintained and minimize energy use
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