Download or read book Evaluation of Temporary Day night Visible Raised Pavement Marker Adequacy written by Thomas D. Davis and published by . This book was released on 1986 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Temporary Day night Visible Raised Pavement Marker Adquacy written by Thomas D. Davis and published by . This book was released on 1989 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Temporary Day night Visible Raised Pavement Marker Adquacy written by Thomas D. Davis and published by . This book was released on 1989 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spacing of Raised Reflective Pavement Markers written by Judson S. Matthias and published by . This book was released on 1988 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation Research Record written by and published by . This book was released on 1988 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Pavement Markings for Improved Visibility During Wet Night Conditions written by Benjamin H. Cottrell and published by . This book was released on 1996 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluated the night visibility of waffle tape and paint with large beads, particularly during wet night conditions. Data were collected at two sites along a primary arterial. The evaluation included an examination of (1) the application of the markings, (2) the visibility of the markings using retroreflectometer measurements and subjective assessments, and (3) the costeffectiveness of the markings. The study revealed: (1) compared with paint with standard beads, the waffle tape and paint with large beads were slightly more retroreflective during light rain at night and recovered quicker after flooding out, (2) the marginal improvement in visibility during periods of light rain do not offset the operational problems of applying paint with large beads, and (3) the benefits of waffle tape during light rain do not appear to justify its use solely for wet night visibility. Because of the above findings, snowplowable raised pavement markers, which are very visible in wet night conditions, appear to be more cost-effective. The study recommends that (1) VDOT continue to use and maimain snowplowable raised pavement markers for visibility during wet night conditions, (2) VDOT continue to monitor FHWA's study on all weather pavement markings, and (3) the Suffolk District consider testing nonsnowplowable raised pavement markers to assess their use as a low-cost alternative to improve visibility during wet night conditions where snowplowing occurs infrequently.
Download or read book Evaluation of Raised Pavement Markers for Roadway Delineation During Fog written by Frank D. Shepard and published by . This book was released on 1976 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reduced visibility on the highway due to adverse weather conditions results in an inability of motorists to readily observe pavement markings, signs, and vehicles. The condition that presents the most serious restriction is fog, although rainfall during the night frequently creates serious visibility problems. Because of the ability of reflex reflective devices and materials to provide pavement and roadway delineation at relatively low costs, the feasibility of using them for roadway delineation and vehicle guidance during fog was investigated, with emphasis on the nighttime visibility characteristics. Also, consideration was given to various experimental methods of marker placement for roadway delineation and to protecting the markers from snowplow damage. Two types of corner-cube raised markers were placed along the highway edge line on 20-ft. (6.1 m) centers. In one placement concept, snowplowable and non-snowplowable markers were placed on the pavement surface; in a second, concept, the markers were recessed below the pavement surface in grooves. The marking systems were subjectively evaluated by observing the legibility properties during fog and noting the number of markers visible. Based on the observations, the raised pavement markers were thought to provide sufficient nighttime roadway delineation for vehicle guidance during light to medium density fogs. Although data were not available for dense fog, it is felt that adequate delineation would be provided for such fog conditions. The method of grooving the pavement in the vicinity of the edge line for the purpose of recessing the markers to provide snowplowability was found to be feasible, providing adequate drainage is provided and a groove is placed in front of the marker. The length of the groove depends upon the reflectivity-distance requirements.
Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Information Service and published by . This book was released on 1989 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transit Pricing and Performance written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1986 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of the Model 66 Raised Pavement Marker System by Stimsonite written by Frank D. Shepard and published by . This book was released on 1988 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A demonstration project was set up to test a marking system by Stimsonite designed to provide daytime and nighttime delineation for work zones. The temporary markers were placed on five-foot centers along the centerline and edge lines. This study presents an evaluation of the marking system by a task force formed to observe its installation and removal and to assess its durability and day/night delineation capabilities.
Download or read book Evaluation of Temporary Raised Pavements Markers in Work Zones written by and published by . This book was released on 1987 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guidelines for Highway Delineation written by Edward R. Pennell and published by . This book was released on 1993 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project advanced the implementation of current technical knowledge in many areas of delineation and clarified the position of the New Jersey Department of Transportation's units and management on unresolved issues. By reviewing literature, making field inspections, and from interviews with professionals, delineation needs and issues were developed. Decisions on delineation issues were made from questionnaire surveys and meetings of New Jersey Department of Transportation managers and professionals.
Download or read book Traffic Quarterly written by and published by . This book was released on 1991 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Temporary Pavement Marking Systems for Resurfacing Zones written by Helmut T. Zwahlen and published by . This book was released on 1996 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation Weekly Government Abstracts written by and published by . This book was released on 1987 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Maintenance on High Volume Traffic Roads written by and published by . This book was released on 1990 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transportation Quarterly written by and published by . This book was released on 1991 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
