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.
Download or read book Updated minimum retroreflectivity levels for traffic signs written by and published by . This book was released on 2003 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
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:
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.
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.
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.
Download or read book Minimum Retroreflectivity Requirements for Traffic Signs written by J. F. Paniati and published by . This book was released on 1993 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Updated Minimum Retroreflectivity Requirements for Traffic Signs written by and published by . This book was released on 2003 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book An Implementation Guide for Minimum Retroreflectivity Requirements for Traffic Signs written by and published by . This book was released on 1998 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impact of Minimum Retroreflectivity Values on Sign Replacement Practices written by H. Gene Hawkins and published by . This book was released on 1996 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Minimum Retroreflectivity Requirements for Traffic Signs written by J. F. Paniati and published by . This book was released on 1993 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Minimum Retroreflectivity of Traffic Signs and Pavement Markings written by Steve J. Gent and published by . This book was released on 1995 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing an Understanding of the Implications of Traffic Sign Retroreflectivity Guidelines for the Province of New Brunswick written by Denis P. Paradis and published by . This book was released on 2013 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: "One of the high priorities held by most transportation agencies, at all levels of government, is the provision of effective traffic signs to make the operation of highways, roads and streets safer. Retro-reflectivity of those signs is a key determinant of their effectiveness, and in Canada, signing standards and guidelines are set at a national level by the Transportation Association of Canada (TAC). Guidelines for minimum retroreflectivity levels have recently been published by TAC in response to the standard adopted in the United States in 2007 through the Federal Highway Administration (FHWA). These proposed guidelines for minimum retroreflectivity imply that the various transportation departments need to evaluate their current position with their existing inventory of traffic signs and determine the number of signs that are non-compliant and, hence, the number they will potentially have to replace. In response, the New Brunswick Department of Transportation and Infrastructure (NBDTI) had the University of New Brunswick Transportation Group conduct a study to estimate the proportion of traffic signs that fail to meet the minimum standards of retroreflectivity and to estimate the cost of replacing those signs. Over 1100 signs were sampled throughout New Brunswick in the various NBDTI Districts. In addition to retroreflectivity levels, other data were collected that have potential to provide some explanatory ability to predict retroreflectivity degradation. Analysis of the data revealed the factors having statistical significance include sign age, geographic location (District), road class (where sign was inventoried) and the visual condition rating given in the field. Retroreflectivity of the signs was compared to the minimum levels established by the FHWA (since TAC guidelines were only published post-analysis). About 20 percent of the existing signs do not meet the FHWA minimum standards of retroreflectivity."--Page ii.
Download or read book Roadside Design Guide written by American Association of State Highway and Transportation Officials. Task Force for Roadside Safety and published by . This book was released on 1989 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
