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Suggested Citation:"Front Matter." National Academies of Sciences, Engineering, and Medicine. 2020. Solid-State Roadway Lighting Design Guide: Volume 2: Research Overview. Washington, DC: The National Academies Press. doi: 10.17226/25679.
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© 2019 National Academy of Sciences. All rights reserved. ACKNOWLEDGMENTS The research for this document was conducted through one or more programs administered by the Cooperative Research Programs (CRP) of the Transportation Research Board (TRB) of the National Academies of Sciences, Engineering, and Medicine: • Airport Cooperative Research Program (ACRP) research is sponsored by the Federal Aviation Administration (FAA). • Hazardous Materials Cooperative Research Program (HMCRP) research is sponsored by the Pipeline and Hazardous Materials Safety Administration (PHMSA). • National Cooperative Freight Research Program (NCFRP) research is sponsored by the Office of the Assistant Secretary for Research and Technology. • National Cooperative Highway Research Program (NCHRP) research is sponsored by the American Association of State Highway and Transportation Officials (AASHTO), in cooperation with the Federal Highway Administration (FHWA). • National Cooperative Rail Research Program (NCRRP) research is sponsored by the Federal Railroad Administration. • Transit Cooperative Research Program (TCRP) research is sponsored by the Federal Transit Administration (FTA) in cooperation with the Transit Development Corporation. COPYRIGHT INFORMATION Authors herein are responsible for the authenticity of their materials and for obtaining written permissions from publishers or persons who own the copyright to any previously published or copyrighted material used herein. Cooperative Research Programs (CRP) grants permission to reproduce material in this publication for classroom and not-for-profit purposes. Permission is given with the understanding that none of the material will be used to imply endorsement by TRB and any of its program sponsors of a particular product, method, or practice. It is expected that those reproducing the material in this document for educational and not-for-profit uses will give appropriate acknowledgment of the source of any reprinted or reproduced material. For other uses of the material, request permission from CRP. DISCLAIMER This is an uncorrected draft as submitted by the research agency. The opinions and conclusions expressed or implied in the report are those of the research agency. They are not necessarily those of the Transportation Research Board, the National Academies or the program sponsors. This pre-publication document IS NOT an official publication of the Cooperative Research Programs; the Transportation Research Board; or the National Academies of Sciences, Engineering, and Medicine. Recommended citation: Lutkevich, P., R. Gibbons, R. Bhagavathula, and D. Mclean. 2019. Solid-State Roadway Lighting Design Guide: Volume 2: Research Overview. Pre-publication draft of NCHRP Research Report 940. Transportation Research Board, Washington, D.C.

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Providing light beyond the limits of the roadway travel lanes benefits drivers’ visual performance, spectral content of light-emitting diode (LED) sources should be a design consideration, and there are not currently any health impacts from properly designed roadway lighting are among the findings of this survey report.

The TRB National Cooperative Highway Research Program's pre-publication draft of 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.

Also see this guide's accompanying pre-publication draft, NCHRP Research Report 940: Solid-State Roadway Lighting Design Guide: Volume 1: Guidance.

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