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Page 85
Suggested Citation:"Appendix A - Survey Results." 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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Page 85
Page 86
Suggested Citation:"Appendix A - Survey Results." 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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Page 86
Page 87
Suggested Citation:"Appendix A - Survey Results." 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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Page 87
Page 88
Suggested Citation:"Appendix A - Survey Results." 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.
×
Page 88
Page 89
Suggested Citation:"Appendix A - Survey Results." 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.
×
Page 89
Page 90
Suggested Citation:"Appendix A - Survey Results." 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.
×
Page 90
Page 91
Suggested Citation:"Appendix A - Survey Results." 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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Page 91

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85 A P P E N D I X A Survey Results 1 Does your Transportation Agency/Department have a Design Manual or policy design standards specifically for LED Roadway Lighting? 2 Does your Transportation Agency/Department have construction Technical Specifications specifically for LED Roadway Lighting? Yes Yes No No (September 2017)

86 Solid-State Roadway Lighting Design 3 Which industry-recognized Roadway Lighting guidelines does your Agency/Department primarily follow? 4 As part of your LED Roadway Lighting Design Manual or Technical Specifications for either new design or retrofits, does your agency allow for reduced illumination (adaptive lighting) design criteria? Yes No AASHTO Roadway Lighting Design Guide In-House criteria ANSI/IES RP-8 Roadway Lighting

Survey Results 87 5 Are all new installations using LED luminaires? 6 Does your Agency/Department use other design modifications when applying LED lighting designs (e.g., occupancy sensors, curfew dimming, tune-able white, etc.)? Yes No All with exception of partial replacement Yes, but other options are ok Most but HPS is still allowed Yes but there are exceptions LED is primary but other sources ok Provisional Preapproved list All LED, HID if requested by locals Yes No

88 Solid-State Roadway Lighting Design 7 Please indicate what Correlated Color Temperature (CCT) your Agency/Department currently specifies for LED Roadway lighting. Check all that apply and/or write in the other box. 8 Does your Transportation Agency/Department currently have any LED Roadway Lighting projects in design, in construction, or installed and fully operational? Check all that apply.

Survey Results 89 9 Approximately how much of your roadway lighting system is currently LED? 10 Does your Agency/Department require lighting calculations to be submitted as part of design reviews? Yes No Sometimes, depends on size of the project

90 Solid-State Roadway Lighting Design 11 Does your Agency/Department verify lighting levels as part of construction completion before acceptance? 12 If a spot replacement of a luminaire is required (due to knockdown, failure, etc.), is the fixture typically replaced in kind (same source, HPS for HPS) or replaced with a new LED fixture (mixed source, HPS for LED)? Yes No Sometimes We will typically allow for mixed sources in the case of light failure replacements We will typically replace in-kind, keeping the sources consistent for the area Replacing with LED is an option depending upon funding availability and current inventory We allowed both. At least one maintenance contract has LED conventional fixtures We are just now going to mixed source Only LED allowed to install. No more HPS

Survey Results 91 13 If there was a National Design Manual and Technical Specification available specifically tailored to LED Roadway Lighting would your Agency/Department consider using it? Yes No

Next: Appendix B - DOT Manuals and Specifications »
Solid-State Roadway Lighting Design Guide: Volume 2: Research Overview Get This Book
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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.

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

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