Download or read book A Review of KDOT Overhead Guide Sign Lighting Policy written by Aditya Gund and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Before year 2012 the US States must implement and continue using an assessment or management method to maintain traffic signs' retro-reflectivity at or above the minimum levels adopted by FHWA. Overhead guide signs are a particular problem because past research has shown that with available sheeting types, external illumination may still be necessary. Newer sheeting types and more energy efficient and cost-effective lighting systems are currently available. Over the next several years there is potential for savings of tens of thousands of dollars if the states don't have to use external illumination for their overhead guide signs, or, if more energy efficient, low cost lighting systems are used when necessary. A detailed literature review was conducted on minimum retro-reflectivity values for overhead guide signs, the legibility distance under reduced sign luminance and the lighting systems available for external illumination. There is no agreement found in the previous research studies as to what is the optimum or minimum luminance of the guide signs. In addition, a survey was sent to all state DOTs. This survey was focused on finding states' policies regarding the use of sheeting type and external illumination requirement, and methods and lighting systems for maintaining minimum values for overhead guide sign luminance. The total response rate was 56% (28 out of 50 state DOTs responded). Out of 28 respondents 19 said that they have usage policy for the type of sheeting material used for overhead guide signs and 18 of them provided details about their policy. An equipment to control the illumination levels from vehicle headlamps was built and pilot tests were conducted in the laboratory. A pulse-with-modulation dimming circuit designed around the Atmel ARM-based microcontroller board and power MOSFETs was used to control the brightness of the headlights for the high- and low-beams. Field tests were conducted in the later stages during nighttime to evaluate three different types of sheeting materials using 10 human subjects from age group 18-34. The materials DG3 and Type IV were found to perform better than Type I material for nighttime visibility but they were not significantly different from each other.
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.
Download or read book Roundabouts written by Lee August Rodegerdts and published by Transportation Research Board. This book was released on 2010 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts. This report updates the U.S. Federal Highway Administration's Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.
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.
Download or read book Freeway Guide Sign Replacement written by Hugh W. McGee and published by Transportation Research Board. This book was released on 1991 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to traffic engineers, planners, and others interested in making sure that motorists' needs for directional information on freeways are being met. Information is provided on policies and procedures used by states in evaluating freeway guide signs and replacing those that are outdated or deteriorated. Many signs on freeways and other controlled-access highways have exceeded their service life and are no longer serving motorists' needs. This report of the Transportation Research Board describes the policies, proceduress, and criteria used by states for freeway sign evaluation and replacement programs.
Download or read book Superpave Mix Design written by Asphalt Institute and published by . This book was released on 2001-01-01 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin and Ultra thin Whitetopping written by Robert Otto Rasmussen and published by Transportation Research Board. This book was released on 2004 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 338: Thin and Ultra-Thin Whitetopping summarizes available information to document how state departments of transportation and others are currently using thin and ultra-thin whitetopping overlays among various pavement rehabilitation alternatives. The report covers all stages of the proper application of whitetopping overlays, including project selection, design, materials selection, construction, maintenance, and eventual rehabilitation or replacement.
Download or read book Quick Response Freight Manual written by Travel Model Improvement Program (U.S.) and published by . This book was released on 1996 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highway Improvement Program written by and published by . This book was released on 1964 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federal aid Policy Guide written by and published by . This book was released on 1995 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Capital Preventive Maintenance written by and published by . This book was released on 2004 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Geometric Design Research for Improved Safety and Operations written by Kay Fitzpatrick and published by . This book was released on 2001 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 299: Recent Geometric Design Research for Improved Safety and Operations reviews and summarizes selected geometric design research published during the 1990s, particularly research with improved safety and operations implication.
Download or read book Commercial Management and Financing of Roads written by Ian Graeme Heggie and published by World Bank Publications. This book was released on 1998-01-01 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Printed on Demand. Limited stock is held for this title. If you would like to order 30 copies or more please contact [email protected] Contact [email protected], if currently unavailable. In developing and transition economies, 60 to 80 percent of all passenger and freight transport moves by road-the main form of access for most rural communities. Yet most of the 11 million kilometers of roads in these economies are badly maintained and poorly managed. This paper discusses one of the most effective ways to promote sound policies for managing and financing road networks--commercialization. It discusses the emerging central concept of bringing roads into the marketplace, putting them on a fee-for-service basis, and managing them like a business.
Download or read book Traffic Monitoring Guide written by United States. Federal Highway Administration. Office of Highway Information Management and published by . This book was released on 1992 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock socketed Shafts for Highway Structure Foundations written by John P. Turner and published by Transportation Research Board. This book was released on 2006 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 360: Rock-Socketed Shafts for Highway Structure Foundations explores current practices pertaining to each step of the design process, along with the limitations; identifies emerging and promising technologies; examines the principal challenges in advancing the state of the practice; and investigates future developments and potential improvements in the use and design of rock-socketed shafts.
Download or read book Appendix N written by Peter Bebergal and published by National Geographic Books. This book was released on 2021-02-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An anthology investigating the influences behind Dungeons & Dragons, the most popular modern role-playing game. Drawing upon the original list of “inspirational reading” provided by Gary Gygax in the first Dungeon Master's Guide, published in 1979, as well as hobbyist magazines and related periodicals that helped to define the modern role-playing game, Appendix N offers a colletion of short fiction and resonant fragments that reveal the literary influences that shaped Dungeons & Dragons, the world's most popular RPG. The stories in Appendix N contextualize the ambitious lyrical excursions that helped set the adventurous tone and dank, dungeon-crawling atmospheres of fantasy roleplay as we know it today. Featuring tales by Poul Anderson, Frank Brunner, Ramsey Campbell, Lin Carter, Lord Dunsany, Robert E. Howard, Tanith Lee, Fritz Leiber, H. P. Lovecraft, David Madison, Michael Moorcock, C. L. Moore, Fred Saberhagen, Clark Ashton Smith, Margaret St. Clair, Jack Vance, and Manly Wade Wellman.
Download or read book Positive Guidance in Traffic Control written by Gerson J. Alexander and published by . This book was released on 1975 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The progress that has been made in developing the positive guidance concept is documented, and the meaning of positive guidance, the philosophy of driver performance upon which it is based the nature of the driving task at those locations where positive guidance is applicable, and a procedure for its application are discussed. This report describes what must be done to improve the information system at hazardous locations. Positive guidance which is an information system matched to the facility characteristics and driver attributes, is based on the premise that a driver can be given sufficient information where he needs it and in the form that he can best use to avoid hazards.
