Download or read book Retroreflectivity of Roadway Signs for Adequate Visibility written by and published by . This book was released on 1987 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual deals with the reflectivity of traffic signs. It interprets and explains the specifications and test procedures in the standard specifications for construction of roads and bridges on federal highway projects (fp-85) dealing with retroreflective sheeting and related matters and provides guidance where appropriate. Topics covered include: 1) principles of retroreflection and characteristics of sign reflective sheeting. 2) Considerations in selecting different sheeting types. 3) Fp-85 specifications and test procedures. 4) Sign fabrication. 5) Handling, stockpiling, and installing. 6) Inventory, inspection, and replacement. 7) Maintenance.

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 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 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 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 Impact Assessment of Revised Retroreflectivity Requirements for Highway Signs in Montana written by John Michael Mounce and published by . This book was released on 1995 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this report is to give a preliminary assessment of the impact that revised retroreflectivity requirements will have on the State of Montana. Conclusions and recommendations are made future management and handling of sign inventory data in Montana. This objective is addressed through the following tasks: Task A: Review, assimilation and analyses of current literature available on a nationwide basis; Task B: Discussion of results from a multi state phone solicitation regarding state sign management practices and policies; Task C: An assessment of sign reflectivity inspection equipment and sampling methodology; and Task D: Evaluation of Montana sign inventory on the basis of current practices and condition of a limited sampling of signs. Recommendations of this report include upgrading of, or improvements to Montana Department of Transportation sign management system and multi-district statewide retroreflective sampling to better determine the impacts revised standards may have.

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 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:

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 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 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 Fatal Accident Reporting System written by and published by . This book was released on 1980 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Traffic Sign Retroreflectivity written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One cause of highway accidents is the inability to see traffic signs because of their decreased retroreflectivity which is necessary for night driving. Traffic signs must be clearly visible and easily understood in time for a driver to respond. The retroreflectivity of a sign depends on the sheeting material used and subsequently its abiilty to redirect a vehicles' headlights back to the driver. Currently the only Canadian guidelines for nighttime visibility signs are in the Uniform Traffic Control Devices for Canada (UTCD). The manual simply states that warning and regulatory signs be reflectorized or illuminated to show the same colour and shape during day and night. No minimum retroreflectivity standards have been established. This research involved an evaluation of two-hundred-and-eighty-one in-service traffic signs for different districts and road CLes in New Brunswick. The measurements were obtained in the autumn of 1994 during daylight using a retroreflectometer. A comparison is made between the data obtained and the recently developed United States Federal Highway Administration (FHWA) standards. Furthermore, a sign management system is discussed based on the survey results. For the covering abstract of this conference see IRRD number 872753.

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 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 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 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