National Academies Press: OpenBook

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

Chapter: Chapter 8 Safety Rest Areas

« Previous: Chapter 7 Electrical System Requirements
Page 50
Suggested Citation:"Chapter 8 Safety Rest Areas." 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.
×
Page 50

Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

43 Chapter 8 – Safety Rest Areas Current Guide The current AASHTO guide discusses safety rest areas and gives recommendations for lighting levels within the rest area, entrance roads, and parking areas. Requirements for minimizing glare are also included in the guide. Additional Considerations for LED Sources The lighting levels with safety rest areas would not be modified based on the use of LEDs. Some considerations that might be useful include. • Consider adaptive lighting at these facilities with dimming occurring when activity is reduced. Dimming could occur using the lighting level for major activities to minor activities. Roadway and gore areas should be dimmed to the same levels as the mainline roadway lighting. Consider motion sensors for public areas off the roadway. The use of dimming, however, must be specific to the area, DOT preferences, expected use, and security concerns for the area. • Various CCT sources could be used to delineate areas within the rest area (e.g., vending, pedestrian paths) to assist in identification and wayfinding. • Glare should be limited to the mainline roadway so that the driver on the mainline does not see an increase in the veiling luminance ratio prescribed in Chapter 3. Key Issues • Consider adaptive lighting for safety rest areas if deemed appropriate by the owner. • Consider pedestrian and vehicle flow as part of the design. • Assess and design to mitigate any glare to mainline roadway.

Next: Chapter 9 - Roadway Sign Lighting »
Solid-State Roadway Lighting Design Guide: Volume 1: Guidance Get This Book
×
MyNAP members save 10% online.
Login or Register to save!
Download Free PDF

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 pre-publication draft of 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 pre-publication draft, NCHRP Research Report 940: Solid-State Roadway Lighting Design Guide: Volume 2: Research Overview.

  1. ×

    Welcome to OpenBook!

    You're looking at OpenBook, NAP.edu's online reading room since 1999. Based on feedback from you, our users, we've made some improvements that make it easier than ever to read thousands of publications on our website.

    Do you want to take a quick tour of the OpenBook's features?

    No Thanks Take a Tour »
  2. ×

    Show this book's table of contents, where you can jump to any chapter by name.

    « Back Next »
  3. ×

    ...or use these buttons to go back to the previous chapter or skip to the next one.

    « Back Next »
  4. ×

    Jump up to the previous page or down to the next one. Also, you can type in a page number and press Enter to go directly to that page in the book.

    « Back Next »
  5. ×

    To search the entire text of this book, type in your search term here and press Enter.

    « Back Next »
  6. ×

    Share a link to this book page on your preferred social network or via email.

    « Back Next »
  7. ×

    View our suggested citation for this chapter.

    « Back Next »
  8. ×

    Ready to take your reading offline? Click here to buy this book in print or download it as a free PDF, if available.

    « Back Next »
Stay Connected!