National Academies Press: OpenBook

Solid-State Roadway Lighting Design Guide: Volume 1: Guidance (2020)

Chapter: Abbreviations and Acronyms

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Page 59
Suggested Citation:"Abbreviations and Acronyms." National Academies of Sciences, Engineering, and Medicine. 2020. Solid-State Roadway Lighting Design Guide: Volume 1: Guidance. Washington, DC: The National Academies Press. doi: 10.17226/25678.
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Page 59
Page 60
Suggested Citation:"Abbreviations and Acronyms." National Academies of Sciences, Engineering, and Medicine. 2020. Solid-State Roadway Lighting Design Guide: Volume 1: Guidance. Washington, DC: The National Academies Press. doi: 10.17226/25678.
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Page 60

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59 Abbreviations and Acronyms ANSI American National Standards Institute BUG backlight-uplight-glare CCT correlated color temperature cd candela CIE International Commission on Illumination CMF crash modification factor CMS central management system DOE U.S. Department of Energy DOT department of transportation fc footcandle GPS Global Positioning System HID high-intensity discharge HPS high-pressure sodium HSR high surround ratio HUR high uniformity ratio IES Illuminating Engineering Society ITS intelligent transportation system K kelvin kA kiloampere kW-h kilowatt-hour LED light-emitting diode LLD lamp lumen depreciation LMM linear mixed model LPS low-pressure sodium LSR low surround ratio LUR low uniformity ratio MMLR mixed models logistic regression mph miles per hour MTBF mean time between failures NEMA National Electrical Manufacturers Association nm nanometers O&M operations and maintenance PLC powerline carrier SHRP 2 second Strategic Highway Research Program SPD spectral power distribution SR surround ratio SSD stopping sight distance

60 Solid-State Roadway Lighting Design SSL solid-state lighting TAC Transportation Association of Canada VA volt-ampere VL visibility level VTTI Virginia Tech Transportation Institute

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The lighting industry has changed dramatically over the past decade. The optical system design of legacy high-intensity discharge (HID) luminaires was restricted to the lamp, refractor, and reflector design, which had limits in the distribution of the light, controls, and adaptability. Roadway luminaires have moved beyond this design methodology to include the vast possibilities presented by solid-state lighting (SSL). At present, in the form of light emitting diodes (LED), SSL uses lower energy, reduces maintenance, improves color, and can be easily dimmed and controlled.

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.

Also see this guide's accompanying report, NCHRP Research Report 940: Solid-State Roadway Lighting Design Guide: Volume 2: Research Overview.

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