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Use Of Solar Energy For Lighting Of Overhead Guide Signs Roadway Lighting And Intersection Traffic Signals
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Book Synopsis Use of Solar Energy for Lighting of Overhead Guide Signs, Roadway Lighting, and Intersection Traffic Signals by : Jonathan Upchurch
Download or read book Use of Solar Energy for Lighting of Overhead Guide Signs, Roadway Lighting, and Intersection Traffic Signals written by Jonathan Upchurch and published by . This book was released on 1990 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal objective of this study was to demonstrate the technological and economic feasibility (or lack thereof) of photovoltaic powered systems for overhead guide sign lighting, roadway lighting, and traffic signalization. A preliminary technical and economic feasibility study concluded that the first two applications were feasible, but that full-scale traffic signalization was not. In lieu of full-scale traffic signalization, the project developed a system to power flashing warning lights. Photovoltaic systems were designed, constructed, field tested and evaluated for overhead guide sign lighting, roadway lighting, and powering of flashing warning lights. All these systems were found to be dependable and economical for application at remote sites where a conventional power supply is not available. In addition, previous research has shown that roadway lighting can have a safety benefit at remote locations which have a high nighttime accident rate and that flashing warning lights have a safety benefit.
Book Synopsis Use of Solar Energy for Lighting of Overhead Guide Signs, Roadway Lighting, and Intersection Traffic Signals by : Jonathan Upchurch
Download or read book Use of Solar Energy for Lighting of Overhead Guide Signs, Roadway Lighting, and Intersection Traffic Signals written by Jonathan Upchurch and published by . This book was released on 1990 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal objective of this study was to demonstrate the technological and economic feasibility (or lack thereof) of photovoltaic powered systems for overhead guide sign lighting, roadway lighting, and traffic signalization. A preliminary technical and economic feasibility study concluded that the first two applications were feasible, but that full-scale traffic signalization was not. In lieu of full-scale traffic signalization, the project developed a system to power flashing warning lights. Photovoltaic systems were designed, constructed, field tested and evaluated for overhead guide sign lighting, roadway lighting, and powering of flashing warning lights. All these systems were found to be dependable and economical for application at remote sites where a conventional power supply is not available. In addition, previous research has shown that roadway lighting can have a safety benefit at remote locations which have a high nighttime accident rate and that flashing warning lights have a safety benefit.
Book Synopsis Estimated Highway Planning and Research Program by :
Download or read book Estimated Highway Planning and Research Program written by and published by . This book was released on 1990 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Australian Road Research written by and published by . This book was released on 1988 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transportation... Weekly Government Abstracts by :
Download or read book Transportation... Weekly Government Abstracts written by and published by . This book was released on 1991 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis LEDs, Curfews and Solar Power Reduce Lighting Costs by : Kenneth A. Winter
Download or read book LEDs, Curfews and Solar Power Reduce Lighting Costs written by Kenneth A. Winter and published by . This book was released on 2008 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: VDOT and other highway agencies have explored lighting changes in the past. Many state departments of transportation are searching for ways to be more energy efficient while maintaining a transportation system that is safe, facilitates movement of people and goods, and improves the overall quality of life of citizens. Local budget shortfalls, overall economic downturns, upward trends in energy costs and increasing concern for the environmental impact of highway operations are driving state departments of transportation and similar agencies to reconsider current practices in roadway lighting. Such changes have been considered before, typically during difficult economic times or times when the cost of energy has risen unexpectedly, starting with the Oil Embargo of 1973-74. In fact, VDOT has explored the issue from conservation, safety, and risk assessment angles ... The purpose of roadway lighting is to provide improved safety, security, and aesthetics for the various users of the roadways and associated facilities (including bridge and tunnel lighting, sign lighting, roadway delineation and even parking facilities). AASHTO's Roadway Lighting Design Guide, (October 2005, p. 7) cites National Highway Traffic Safety Administration (NHTSA) crash data as showing that "90 percent of fatal and injury crashes occur the roadway, where lighting guidelines specify that light be placed, are multiple vehicle crashes. The number of overall crashes tapers off substantially after midnight on weekdays and after 4:00 a.m. on weekend. At these late hours, most of the crashes are single vehicle, off-roadway crashes for which lighting may not be likely to help, except possibly at decision-making points such as ramp gorges, intersections, and merge areas." AASHTO's guide notes that crash rates increase where lighting systems are turned off or where every other luminary is turned off. Dimming or "lighting curfews" may be less likely to result in increased crash rates. Still, in an effort to save money, many agencies periodically consider altering the way they light roadways. Some options for reducing energy consumption related to roadway lighting include: Solar-powered lighting for overhead highway signs or in other standalone applications; Lighting spaced farther spaced, or the "every-other-luminary" technique; Reducing the overall amount or level of continuous roadway lighting; Replacing traditional lighting elements with energy efficient elements (namely LED lights); Increased lighting curfews or "incremental dimming" of roadway or sign lights; Using more highly retroreflective of signs or safety markings or experimenting with electroluminescence or photoluminescence; Using sensors or other advanced technologies to automate lighting in a more precise way. "During the past decade, several highway agencies have switched off roadway lighting during periods of energy shortages to reduce maintenance and operating costs. However, quite often such lighting was restored when nighttime accidents increased. One fundamental problem with such light reduction techniques was that lighting was reduced or eliminated during the entire nighttime period, rather than only when traffic volume was low. By providing full lighting during periods when volumes are high and the roadway operated near capacity and providing reduced lighting as the traffic decreases, the potential exists for realizing considerable energy savings while still providing the benefits of full lighting at key locations (i.e. intersections) and at key times (i.e., high volume) where driver decision-making is the most critical and the greatest visibility is required." (Roadway Lighting Design Guide, October 2005, p. 7).
Book Synopsis Compendium of Technical Papers, Annual Meeting, Institute of Transportation Engineers, District 6 by :
Download or read book Compendium of Technical Papers, Annual Meeting, Institute of Transportation Engineers, District 6 written by and published by . This book was released on 1988 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Nighttime Visibility of Overhead Signs by : Paul John Carlson
Download or read book Guidelines for Nighttime Visibility of Overhead Signs written by Paul John Carlson and published by . This book was released on 2016 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter 1. Introduction -- chapter 2. Background -- chapter 3. Closed-course study -- chapter 4. Open-Road study -- chapter 5. Research findings -- References -- appendix A. Incremental effects of light sources and sign sheeting on legend luminance for overhead guide signs -- appendix B. Assessment of background complexity using digital images of roadway scenes by image processing -- appendix C. Open-road study details -- appendix D. Guidelines for Nighttime overhead sign visibility.
Book Synopsis Solar Powered Lighting for Overhead Highway Signs by : Hirak Chandra Patangia
Download or read book Solar Powered Lighting for Overhead Highway Signs written by Hirak Chandra Patangia and published by . This book was released on 2009 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HRIS Abstracts written by and published by . This book was released on 1990 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1991 with total page 1390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis "Lights Out" Overhead Guide Sign Demonstration Project by : R. G. McMillan
Download or read book "Lights Out" Overhead Guide Sign Demonstration Project written by R. G. McMillan and published by . This book was released on 1989 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :156051325X Total Pages :134 pages Book Rating :4.5/5 (65 download)
Book Synopsis Roadway Lighting Design Guide by : American Association of State Highway and Transportation Officials
Download or read book Roadway Lighting Design Guide written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2005 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide replaces the 1984 publication entitled An Informational Guide for Roadway Lighting. It has been revised and brought up to date to reflect current practices in roadway lighting. The guide provides a general overview of lighting systems from the point of view of the transportation departments and recommends minimum levels of quality. The guide incorporates the illuminance and luminance design methods, but does not include the small target visibility (STV) method.
Book Synopsis IESNA Recommended Practice for Roadway Sign Lighting by :
Download or read book IESNA Recommended Practice for Roadway Sign Lighting written by and published by . This book was released on 2001 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synerjy written by and published by . This book was released on 1991 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis LED Traffic Signal Monitoring, Maintenance, and Replacement Issues by : Thomas Urbanik
Download or read book LED Traffic Signal Monitoring, Maintenance, and Replacement Issues written by Thomas Urbanik and published by Transportation Research Board. This book was released on 2008 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 387: LED Traffic Signal Monitoring, Maintenance, and Replacement Issues explores the maintenance and replacement of light-emitting diode (LED) traffic signal modules"--Publisher's description.