Predicting The Initial Retroreflectivity Of Pavement Markings From Glass Bead Quality

Author : Omar Smadi
Publisher : Transportation Research Board
ISBN 13 : 0309258901
Total Pages : 84 pages
Book Rating : 4.06/5 ( download)

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Download or read book Predicting the Initial Retroreflectivity of Pavement Markings from Glass Bead Quality written by Omar Smadi and published by Transportation Research Board. This book was released on 2013 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes a laboratory test method to predict the initial retroreflectivity of pavement markings in the field based on the quality of the applied glass beads.

Author : Omar Smadi
Publisher : Transportation Research Board National Research
ISBN 13 : 9780309258906
Total Pages : 88 pages
Book Rating : 4.01/5 ( download)

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Download or read book Predicting the Initial Retroreflectivity of Pavement Markings from Glass Bead Quality written by Omar Smadi and published by Transportation Research Board National Research. This book was released on 2013 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes a laboratory test method to predict the initial retroreflectivity of pavement markings in the field based on the quality of the applied glass beads.

Author :
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.57/5 ( download)

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Download or read book Evaluation of Wet-weather Pavement Markings written by and published by . This book was released on 2005 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report details the first year of a two-year project. During the first year the emphasis was on determining the wet-night visibility of various pavement marking systems under a variety of realistic rainfall levels. The researchers performed a literature review. They analyzed 20 years of Texas rainfall data to determine the most appropriate rainfall levels to use as design criteria for a rain tunnel. Using a low, medium, and high rainfall rate (0.28, 0.52, and 0.87 in. per hour, respectively), a 1600 ft long rain tunnel was designed and built at Texas A & M University's Riverside Campus. Experimental subjects drove through the rain tunnel and looked for pavement markings simulating skip lines. The researchers rotated pavement marking samples at different locations before each trial. The detection distance was recorded when the subject located the pavement marking sample. The data were analyzed in four main sections: waterborne paints, thermoplastics, tapes, and exotic materials. The analysis also included investigations into the wet-night visibility of rumble stripes, as well as wider lines. The measured dry and wet retroreflectivity measurements were analyzed, and the predictive capabilities of the wet retroreflectivity measurements were evaluated with respect to the wet-night detection distance of the markings.

Author : National Cooperative Highway Research Program
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.22/5 ( download)

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Download or read book Summary of Progress - National Cooperative Highway Research Program written by National Cooperative Highway Research Program and published by . This book was released on 2009 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Benjamin H. Cottrell
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.09/5 ( download)

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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.

Author : James Migletz
Publisher : Transportation Research Board
ISBN 13 : 0309069246
Total Pages : 165 pages
Book Rating : 4.43/5 ( download)

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Download or read book Long-term Pavement Marking Practices written by James Migletz and published by Transportation Research Board. This book was released on 2002 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 306: Long-Term Pavement Marking Practices documents the current and best practices for managing pavement marking systems, identifies future needs, and addresses driver needs and methods of communicating information to drivers, selection criteria (e.g., reflectivity, pavement service life, wet weather performance), materials (e.g., color, durability, cost), specifications, construction practices, inventory management systems, and more.

Author : Ronald Bruce Gibbons
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.02/5 ( download)

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Download or read book Wet Night Visibility of Pavement Markings written by Ronald Bruce Gibbons and published by . This book was released on 2004 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes an investigation into the performance of pavement markings in wet night conditions. The performance of a typical pavement marking will degrade when it gets wet. This is a result of the flooding of the marking optics, thereby reducing retroreflectivity. Several technologies are available to improve wet marking performance. In this project, six technologies were tested using both standard measurement methods and participant evaluations. The results show that two of the marking technologies, raised retroreflective markers and wet retroreflective tape, outperformed the group under all conditions. These markings were also highly accepted by the participants. The results also show that the standard paint and glass beads technology is the worst performing and the least desirable of those evaluated. A comparison of the ASTM retroreflectivity measurement methods and the measured luminance results also indicates that the methods are suitable for the conditions used in the evaluation; however, possible additions and corrections to the methods are outlined in this report. A follow-up study is underway to allow development of a performance-based specification for pavement markings for wet night visibility.

Author : Michael J. Markow
Publisher : Transportation Research Board
ISBN 13 : 0309143209
Total Pages : 223 pages
Book Rating : 4.02/5 ( download)

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Download or read book Pavement Marking Warranty Specifications written by Michael J. Markow and published by Transportation Research Board. This book was released on 2010 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 408: Pavement Marking Warranty Specifications presents information on the use of pavement marking warranties by United States and Canadian transportation agencies, including agency specifications. European experience is also included in the report for comparison purposes. Appendices D and E for NCHRP Synthesis 408 are available online--

Author : James R. Ritter
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.53/5 ( download)

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Download or read book Glass Beads for Highway Paint Stripes written by James R. Ritter and published by . This book was released on 1978 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Haleh Azari
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.71/5 ( download)

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Download or read book Optical Sizing and Roundness Determination of Glass Beads Used in Traffic Markings written by Haleh Azari and published by . This book was released on 2010 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The final report on a project that examined the precision and bias of both optical and traditional mechanical methods for different glass bead types. The project also compared the precision and bias of various measurement methods, and explored development of a practice for the use of computerized optical methods and equipment to measure the size and roundness of glass beads used in traffic markings.