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The findings of this survey report show that providing light beyond the limits of the roadway travel lanes benefits drivers’ visual performance and that the spectral content of light-emitting diode (LED) sources should be a design consideration. The study also found that, at present, there are no health impacts from properly designed roadway lighting.

The TRB National Cooperative Highway Research Program's NCHRP Research Report 940: Solid-State Roadway Lighting Design Guide: Volume 2: Research Overview determines the current guidance for the use of Solid State Lighting (SSL); identifies the research that still needs to be accomplished to assist in its proper implementation; and develops a comprehensive, easy to use, set of guidelines using currently available information and new research being proposed as part of this project.

The TRB National Cooperative Highway Research Program's NCHRP Research Report 940: Solid-State Roadway Lighting Design Guide: Volume 1: Guidance develops more comprehensive guidelines in American Association of State Highway Transportation Officials (AASHTO)-standard format for the application of roadway lighting related to the widespread adoption of SSL, and identifies gaps in knowledge where possible future research will enhance these guidelines. This report is not available from TRB nor the National Academies. The report will be published by AASHTO early in 2022.

Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2020. Solid-State Roadway Lighting Design Guide: Volume 2: Research Overview. Washington, DC: The National Academies Press. https://doi.org/10.17226/25679.

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Publication Info

260 pages |  8.5 x 11 |  DOI: https://doi.org/10.17226/25679

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