Roadway lighting must balance user needs and safety with the impact of the lighting system on the environment. For example, the impact of lighting on flora and fauna might be considered more important for a roadway along a wildlife reserve or in a coastal region, whereas user safety might be more critical on interstates and major arterials.
NCHRP Web-Only Document 420: Gaps and Emerging Technologies in the Application of Solid-State Roadway Lighting, from TRB's National Cooperative Highway Research Program, narrows the knowledge gaps related to the further application of Solid-State Roadway Lighting.
National Academies of Sciences, Engineering, and Medicine. 2024. Gaps and Emerging Technologies in the Application of Solid-State Roadway Lighting. Washington, DC: The National Academies Press.
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