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Sign Retroreflectivity Study
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Book Synopsis Practices to Manage Traffic Sign Retroreflectivity by : Jonathan M. Re
Download or read book Practices to Manage Traffic Sign Retroreflectivity written by Jonathan M. Re and published by Transportation Research Board. This book was released on 2012 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 431: Practices to Manage Traffic Sign Retroreflectivity includes examples of practices that illustrate how different types of transportation agencies might meet federal retroreflectivity requirements for traffic signs.
Book Synopsis Implementation Strategies for Sign Retroreflectivity Standards by : Kent L. Black
Download or read book Implementation Strategies for Sign Retroreflectivity Standards written by Kent L. Black and published by Transportation Research Board. This book was released on 1992 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sign Retroreflectivity Study by : Austin Lyons Bischoff
Download or read book Sign Retroreflectivity Study written by Austin Lyons Bischoff and published by . This book was released on 2002 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research on Traffic Sign Retroreflective Sheeting Performance by : H. Gene Hawkins
Download or read book Research on Traffic Sign Retroreflective Sheeting Performance written by H. Gene Hawkins and published by . This book was released on 2021 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sign retroreflectivity is an important characteristic of traffic signs, and it is a critical factor in defining the effectiveness of signs in a nighttime environment. This synthesis summarizes previous research on various aspects of sign sheeting retroreflectivity in nine areas: basic retroreflectivity science; retroreflectivity materials, specifications, and measurement; sign performance; sign degradation, minimum retroreflectivity; field measurement of sign retroreflectivity; economic benefits; fluorescent materials; and safety. The synthesis of previous research serves as the basis for recommendations for selecting sign sheeting based on sheeting grade and roadway environment.
Book Synopsis Retroreflective Requirements for Traffic Signs - a STOP Case Study. Final Report by : Juan M. Morales
Download or read book Retroreflective Requirements for Traffic Signs - a STOP Case Study. Final Report written by Juan M. Morales and published by . This book was released on 1987 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study determined the performance of STOP signs based on their retroreflective properties. Thirty-five 30-inch STOP signs, including engineering grade and high intensity, were measured in the laboratory to determine their retroreflective properties. A subset of ten signs was taken to the field to determine how far they could be recognized by paid subjects. Mathematical relationships between the various retroreflective properties and recognition distance were developed. The overall specific intensity per unit area (SIA) was found to be a good measure for estimating the recognition distance of STOP signs.
Book Synopsis Obespecenie informacionnych potrebnostej ucenych i specialistov Sibiri by :
Download or read book Obespecenie informacionnych potrebnostej ucenych i specialistov Sibiri written by and published by . This book was released on 1981 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Sign Inventory Study to Assess and Control Liability and Cost by : Stephanie C. Vereen
Download or read book A Sign Inventory Study to Assess and Control Liability and Cost written by Stephanie C. Vereen and published by . This book was released on 2002 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this project was to determine, quantify, and present to the North Carolina Department of Transportation (NCDOT) alternative approaches for meeting the Federal Highway Administration's (FHWA) proposed minimum level of retroreflectivity for signs. This study used knowledge of the current NCDOT sign maintenance practices to synthesize a list of components and alternatives to comply with the standard. The fundamental contribution of the work lies in creating alternative methods to evaluating sign retroreflectivity to ensure compliance with a standard while minimizing the cost and labor required to do so.
Book Synopsis An Implementation Guide for Minimum Retroreflectivity Requirements for Traffic Signs by : Hugh W. McGee
Download or read book An Implementation Guide for Minimum Retroreflectivity Requirements for Traffic Signs written by Hugh W. McGee and published by . This book was released on 1998 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: To assist agencies in developing a cost-effective program for timely replacement of ineffective signs, this document was prepared. Initially the report describes the principles of retroreflectivity, the types of retroreflective materials, and the proposed minimum retroreflectivity guidelines. Then, the report presents the concept of a sign management system, and provides guidance for developing a sign inventory, conducting sign inspections, and maintaining signs. The report concludes with discussing options that State and local agencies can follow for replacing their ineffective signs and offers a minimum and desirable program.
Book Synopsis Traffic Sign Retroreflectivity Measurement Using Human Observers by : Edwin A. Lagergren
Download or read book Traffic Sign Retroreflectivity Measurement Using Human Observers written by Edwin A. Lagergren and published by . This book was released on 1987 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Minimum Retroreflectivity Levels for Blue and Brown Traffic Signs by : Andrew J. Holick
Download or read book Minimum Retroreflectivity Levels for Blue and Brown Traffic Signs written by Andrew J. Holick and published by . This book was released on 2008 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Minimum Retroreflectivity Levels for Overhead Guide Signs and Street-name Signs by : Paul John Carlson
Download or read book Minimum Retroreflectivity Levels for Overhead Guide Signs and Street-name Signs written by Paul John Carlson and published by . This book was released on 2003 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Automated Mobile Highway Sign Retro-reflectivity Measurement by : Norbert H. Maerz
Download or read book Automated Mobile Highway Sign Retro-reflectivity Measurement written by Norbert H. Maerz and published by . This book was released on 2002 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis presents the development of a mobile, image-based system for measuring the brightness of highway signs at night, so that visibility standards for signs can be evaluated and maintained to protect the safety of the motoring public."--Abstract, p. iii
Book Synopsis Traffic Sign Life Expectancy by : Howard Preston
Download or read book Traffic Sign Life Expectancy written by Howard Preston and published by . This book was released on 2014 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highway agencies with an inventory of traffic signs must adopt a method of maintaining those signs so that the retroreflectivity exceeds established thresholds. Understanding expected sign life can help agencies phase sign replacements over a number of years in order to manage maintenance costs. The primary goal of this research is to provide objective data about sign life based on the degradation of retroreflectivity and color over time. A literature review found sign retroreflectivity research around the country, however, none of the studies are conclusive. Eight Minnesota agencies took retroreflectometer readings on in-place signs across the state. Disaggregated measurements by sheeting material and color did not leave a large enough sample for conclusive results, and very few signs fell below minimum retroreflectivity thresholds. Data suggests sign life exceeds the manufacturer's warranty and that a controlled environment with known conditions will produce more reliable data. MnDOT established a test deck at MnROAD to take multiple retroreflectivity and color readings over time to the point of failure in a controlled environment. The best information inferred from the results is an estimate for an expected sign life of 12 to 20 years for beaded sheeting and 15 to 30 years for prismatic sheeting. Agencies are encouraged to move forward and adopt a sign maintenance method and expected sign life by bringing sign management decisions under an umbrella of immunity. This document has suggested best policy practices and statements for sign maintenance and management assembled by a panel including engineers and risk management specialists.
Book Synopsis Research and Recommendations for a Statewide Sign Retroreflectivity Maintenance Program by : Paul John Carlson
Download or read book Research and Recommendations for a Statewide Sign Retroreflectivity Maintenance Program written by Paul John Carlson and published by . This book was released on 2012 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Maintaining Traffic Sign Retroreflectivity by : Kenneth S. Opiela
Download or read book Maintaining Traffic Sign Retroreflectivity written by Kenneth S. Opiela and published by . This book was released on 2007 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report analyzes the impacts that might be expected from the adoption of proposed minimum maintained retroreflectivity levels for traffic signs to improve night visibility. The report evaluates the broad spectrum of concerns expressed by State and local agency staff at four workshops held during the summer of 2002. These include administrative, fiscal, implementation, and tort liability concerns"--Technical report documentation page.
Book Synopsis Impacts on State and Local Agencies for Maintaining Traffic Signs Within Minimum Retroreflectivity Guidelines by : Hugh W. McGee
Download or read book Impacts on State and Local Agencies for Maintaining Traffic Signs Within Minimum Retroreflectivity Guidelines written by Hugh W. McGee and published by . This book was released on 1998 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Federal Highway Administration (FHWA) has developed guidelines for minimum retroreflectivity levels for four groups of signs: 1) yellow/orange-on-black warning signs, 2) black-on-white regulatory signs, 3) white-on-red regulatory signs, and 4) white-on-green guide signs. The report presents data on percentage of signs by the various types of retroreflective sheeting for both States and local agencies, a distribution of age of signs by type of sheeting, and the percentage of signs that would not meet the minimum retroreflectivity values. The report also presents a summary of the data and comments provided by the participating agencies related to the minimum retroreflectivity values.
Book Synopsis Updated Minimum Retroreflectivity Levels for Traffic Signs by : Paul John Carlson
Download or read book Updated Minimum Retroreflectivity Levels for Traffic Signs written by Paul John Carlson and published by . This book was released on 2003 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report includes an updated set of recommended MR levels for traffic signs based on recent developments in vehicle headlamps, vehicle types/sizes, nighttime driver needs, and newer sheeting materials. The updated MR levels are also based on more robust computer modeling of retroreflective sheeting performance.
