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Solid-State Roadway Lighting Design Guide: Volume 2: Research Overview (2020)

Chapter: Appendix C - Illuminance Characterization Tables

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Page 98
Suggested Citation:"Appendix C - Illuminance Characterization Tables." 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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Suggested Citation:"Appendix C - Illuminance Characterization Tables." 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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Suggested Citation:"Appendix C - Illuminance Characterization Tables." 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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Suggested Citation:"Appendix C - Illuminance Characterization Tables." 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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Suggested Citation:"Appendix C - Illuminance Characterization Tables." 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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Suggested Citation:"Appendix C - Illuminance Characterization Tables." 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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Suggested Citation:"Appendix C - Illuminance Characterization Tables." 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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Suggested Citation:"Appendix C - Illuminance Characterization Tables." 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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Suggested Citation:"Appendix C - Illuminance Characterization Tables." 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 106

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98 A P P E N D I X C Illuminance Characterization Tables Table C-1. 2100K HPS Horizontal Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Horizontal Horizontal Horizontal Horizontal Medium Maximum 33.3 37.3 31.7 25.0 Average 12.9 13.8 10.9 7.7 Minimum 3.0 3.4 1.0 0.6 Avg./Min. 4.3 4.1 10.8 13.5 Max./Min. 11.2 11.0 31.4 43.6 Surround ratio 0.9 0.7 Note: HPS = high-pressure sodium. Table C-2. 2100K HPS Vertical Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Vertical Vertical Vertical Vertical Medium Maximum 19.9 25.5 23.6 18.9 Average 8.9 11.6 9.5 6.6 Minimum 3.1 3.8 0.2 1.0

Illuminance Characterization Tables 99 Table C-3. 5000K LED HUR-HSR Horizontal Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Horizontal Horizontal Horizontal Horizontal High Maximum 32.0 41.5 47.4 35.9 Average 17.0 19.9 20.4 14.8 Minimum 5.3 1.7 6.4 3.7 Avg./Min. 3.2 11.8 3.2 4.0 Max./Min. 6.1 24.7 7.4 9.7 Surround ratio 0.9 0.7 Medium Maximum 21.2 25.6 28.1 23.1 Average 10.2 12.1 13.7 8.9 Minimum 2.6 1.3 4.3 2.1 Avg./Min. 3.9 9.0 3.2 4.2 Max/Min. 8.0 19.0 6.5 10.7 Surround ratio 0.8 0.7 Low Maximum 16.3 17.6 19.5 19.9 Average 8.2 8.8 8.9 7.3 Minimum 1.2 1.4 2.5 1.2 Avg./Min. 6.9 6.3 3.5 6.2 Max./Min. 13.8 12.7 7.7 16.8 Surround ratio 0.9 0.8 Note: HUR = high uniformity ratio; HSR = high surround ratio. Table C-4. 5000K LED HUR-HSR Vertical Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Vertical Vertical Vertical Vertical High Maximum 25.1 33.0 34.6 23.2 Average 14.2 16.1 15.8 11.6 Minimum 2.0 2.4 1.3 3.2 Medium Maximum 15.1 20.6 21.3 15.1 Average 8.4 10.1 10.8 7.4 Minimum 1.0 1.7 0.7 1.1 Low Maximum 12.8 15.7 17.1 12.4 Average 7.4 9.3 8.0 5.8 Minimum 1.5 1.0 0.7 1.2

100 Solid-State Roadway Lighting Design Table C-5. 4000K LED HUR-HSR Horizontal Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Horizontal Horizontal Horizontal Horizontal High Maximum 29.5 40.5 42.0 37.5 Average 14.9 18.3 19.8 16.3 Minimum 4.6 4.3 5.7 2.9 Avg./Min. 3.2 4.2 3.5 5.5 Max./Min. 6.4 9.4 7.4 12.8 Surround ratio 0.8 0.8 Medium Maximum 21.1 24.3 26.3 16.1 Average 9.2 11.7 11.2 8.2 Minimum 3.3 2.1 3.1 2.8 Avg./Min. 2.8 5.5 3.6 3.0 Max./Min. 6.4 11.4 8.4 5.8 Surround ratio 0.8 0.7 Low Maximum 14.3 20.8 22.2 20.7 Average 7.5 8.7 10.1 8.7 Minimum 3.2 2.2 3.0 1.6 Avg./Min. 2.4 3.9 3.4 5.3 Max./Min. 4.5 9.4 7.5 12.7 Surround ratio 0.9 0.9 Table C-6. 4000K LED HUR-HSR Vertical Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Vertical Vertical Vertical Vertical High Maximum 22.2 29.0 30.9 23.7 Average 13.7 16.0 16.7 13.0 Minimum 2.4 3.3 2.0 3.5 Medium Maximum 14.0 18.7 19.0 15.3 Average 8.5 10.2 10.1 8.2 Minimum 2.2 1.7 1.6 1.7 Low Maximum 11.1 14.8 15.3 11.9 Average 6.5 8.5 8.7 6.7 Minimum 2.0 2.2 1.7 1.6

Illuminance Characterization Tables 101 Table C-7. 3000K LED HUR-HSR Horizontal Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Horizontal Horizontal Horizontal Horizontal High Maximum 29.2 41.4 39.5 37.7 Average 15.1 20.0 17.8 14.7 Minimum 5.3 4.1 6.3 2.9 Avg./Min. 2.9 4.8 2.8 5.1 Max./Min. 5.6 10.0 6.3 13.0 Surround ratio 0.8 0.8 Medium Maximum 20.5 22.3 27.1 24.8 Average 9.2 10.3 14.8 10.5 Minimum 2.6 1.4 2.4 2.7 Avg./Min. 3.5 7.2 6.3 3.8 Max./Min. 7.8 15.6 11.5 9.1 Surround ratio 0.9 0.7 Low Maximum 15.8 19.1 21.1 13.0 Average 7.7 10.4 9.4 7.6 Minimum 3.1 1.6 1.9 2.0 Avg./Min. 2.5 6.5 5.0 3.8 Max./Min. 5.1 11.9 11.3 6.5 Surround ratio 0.7 0.8 Table C-8. 3000K LED HUR-HSR Vertical Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Vertical Vertical Vertical Vertical High Maximum 20.7 27.6 30.7 23.9 Average 12.6 16.5 15.9 12.2 Minimum 3.0 4.3 2.5 3.1 Medium Maximum 13.8 18.1 19.4 21.5 Average 7.7 9.8 10.5 9.5 Minimum 0.5 1.9 1.8 2.0 Low Maximum 11.4 14.5 14.9 12.2 Average 7.0 7.9 7.9 6.5 Minimum 1.7 1.5 0.8 1.4

102 Solid-State Roadway Lighting Design Table C-9. 4000K LED HUR-LSR Horizontal Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Horizontal Horizontal Horizontal Horizontal High Maximum 25.1 35.7 40.5 35.9 Average 8.3 16.9 18.6 14.1 Minimum 1.5 3.6 5.3 3.4 Avg./Min. 5.7 4.6 3.5 4.1 Max./Min. 17.2 9.8 7.6 10.5 Surround ratio 0.5 0.8 Medium Maximum 16.9 24.8 26.9 25.0 Average 5.2 10.5 11.6 9.4 Minimum 1.0 1.8 2.6 1.7 Avg./Min. 5.1 5.8 4.4 5.6 Max./Min. 16.7 13.8 10.2 14.9 Surround ratio 0.5 0.8 Low Maximum 13.1 18.9 20.5 20.5 Average 4.4 9.4 9.9 8.0 Minimum 1.3 1.1 1.6 1.0 Avg./Min. 3.3 8.3 6.0 7.9 Max./Min. 9.9 16.7 12.5 20.4 Surround ratio 0.5 0.8 Note: LSR = low surround ratio. Table C-10. 4000K LED HUR-LSR Vertical Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Vertical Vertical Vertical Vertical High Maximum 9.8 21.7 23.4 20.7 Average 3.9 10.2 10.8 8.2 Minimum 0.9 2.0 2.4 2.4 Medium Maximum 6.0 13.2 15.5 12.3 Average 1.8 6.6 7.7 5.4 Minimum 0.2 2.4 1.5 1.4 Low Maximum 5.7 11.7 13.2 11.5 Average 2.1 5.8 6.5 4.7 Minimum 0.6 1.0 1.0 1.4

Illuminance Characterization Tables 103 Table C-11. 4000K LED LUR-HSR Horizontal Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Horizontal Horizontal Horizontal Horizontal High Maximum 26.7 36.2 39.9 33.4 Average 12.8 16.5 18.0 12.6 Minimum 3.2 2.2 3.0 2.1 Avg./Min. 4.0 7.4 5.9 5.8 Max./Min. 8.3 16.2 13.2 15.5 Surround ratio 0.8 0.7 Medium Maximum 17.6 25.8 26.4 24.0 Average 7.5 10.6 11.0 8.4 Minimum 1.7 2.5 2.2 1.4 Avg./Min. 4.5 4.2 5.0 5.9 Max./Min. 10.6 10.1 11.9 16.8 Surround ratio 0.7 0.8 Low Maximum 13.7 20.5 21.2 18.3 Average 6.4 8.5 8.4 6.6 Minimum 1.3 2.3 1.7 0.9 Avg./Min. 4.9 3.7 4.9 7.5 Max./Min. 10.4 9.0 12.4 21.0 Surround ratio 0.7 0.8 Note: LUR = low uniformity ratio. Table C-12. 4000K LED LUR-HSR Vertical Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Vertical Vertical Vertical Vertical High Maximum 17.7 26.6 30.0 22.7 Average 9.5 12.7 13.8 10.0 Minimum 1.0 2.5 0.9 1.1 Medium Maximum 11.7 16.6 18.1 13.1 Average 6.3 8.5 8.2 6.0 Minimum 0.7 0.9 0.7 0.7 Low Maximum 9.5 13.6 15.4 11.2 Average 5.2 6.7 6.6 4.5 Minimum 1.2 2.2 0.5 0.3

104 Solid-State Roadway Lighting Design Table C-13. 4000K LED LUR-LSR Horizontal Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Horizontal Horizontal Horizontal Horizontal High Maximum 27.5 37.1 39.9 34.1 Average 9.3 16.6 17.9 13.2 Minimum 3.1 3.9 6.3 4.2 Avg./Min. 3.0 4.3 2.8 3.2 Max./Min. 8.9 9.5 6.3 8.2 Surround ratio 0.6 0.7 Medium Maximum 25.8 26.2 27.8 21.8 Average 7.5 12.5 12.9 8.5 Minimum 2.1 4.3 3.0 1.2 Avg./Min. 3.5 2.9 4.3 6.9 Max./Min. 12.1 6.1 9.2 17.9 Surround ratio 0.6 0.7 Low Maximum 13.1 19.9 21.0 18.4 Average 4.2 7.7 8.9 6.7 Minimum 0.2 0.7 0.9 1.5 Avg./Min. 22.9 10.4 10.2 4.3 Max./Min. 72.0 27.1 24.1 11.9 Surround ratio 0.5 0.7 Table C-14. 4000K LED LUR-LSR Vertical Illuminance Light Level Illuminance (lx) Downhill Shoulder Downhill Lane Uphill Lane Uphill Shoulder Vertical Vertical Vertical Vertical High Maximum 13.1 25.2 28.8 22.6 Average 5.8 13.4 14.3 10.2 Minimum 2.0 4.5 4.0 4.5 Medium Maximum 8.5 15.9 18.3 12.6 Average 4.1 9.4 9.4 6.4 Minimum 0.1 3.8 2.8 1.7 Low Maximum 5.1 12.7 13.9 9.7 Average 2.4 6.7 6.2 4.4 Minimum 0.9 1.3 0.7 0.7

Abbreviations and acronyms used without definitions in TRB publications: A4A Airlines for America AAAE American Association of Airport Executives AASHO American Association of State Highway Officials AASHTO American Association of State Highway and Transportation Officials ACI–NA Airports Council International–North America ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act APTA American Public Transportation Association ASCE American Society of Civil Engineers ASME American Society of Mechanical Engineers ASTM American Society for Testing and Materials ATA American Trucking Associations CTAA Community Transportation Association of America CTBSSP Commercial Truck and Bus Safety Synthesis Program DHS Department of Homeland Security DOE Department of Energy EPA Environmental Protection Agency FAA Federal Aviation Administration FAST Fixing America’s Surface Transportation Act (2015) FHWA Federal Highway Administration FMCSA Federal Motor Carrier Safety Administration FRA Federal Railroad Administration FTA Federal Transit Administration HMCRP Hazardous Materials Cooperative Research Program IEEE Institute of Electrical and Electronics Engineers ISTEA Intermodal Surface Transportation Efficiency Act of 1991 ITE Institute of Transportation Engineers MAP-21 Moving Ahead for Progress in the 21st Century Act (2012) NASA National Aeronautics and Space Administration NASAO National Association of State Aviation Officials NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program NHTSA National Highway Traffic Safety Administration NTSB National Transportation Safety Board PHMSA Pipeline and Hazardous Materials Safety Administration RITA Research and Innovative Technology Administration SAE Society of Automotive Engineers SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005) TCRP Transit Cooperative Research Program TDC Transit Development Corporation TEA-21 Transportation Equity Act for the 21st Century (1998) TRB Transportation Research Board TSA Transportation Security Administration U.S. DOT United States Department of Transportation

TRA N SPO RTATIO N RESEA RCH BO A RD 500 Fifth Street, N W W ashington, D C 20001 A D D RESS SERV ICE REQ U ESTED ISBN 978-0-309-48153-3 9 7 8 0 3 0 9 4 8 1 5 3 3 9 0 0 0 0 Solid-State Roadw ay Lighting D esign, Volum e 2: Research O verview N CH RP Research Report 940 TRB

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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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