Predicting The Initial Retroreflectivity Of Pavement Markings From Glass Bead Quality PDF Download
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Author | : Omar Smadi |
Publisher | : Transportation Research Board |
Total Pages | : 84 |
Release | : 2013 |
Genre | : Beads |
ISBN | : 0309258901 |
Download Predicting the Initial Retroreflectivity of Pavement Markings from Glass Bead Quality Book in PDF, ePub and Kindle
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 | : |
Total Pages | : |
Release | : 2013 |
Genre | : Electronic book |
ISBN | : |
Download Predicting the Initial Retroreflectivity of Pavement Markings from Glass Bead Quality Book in PDF, ePub and Kindle
Author | : Omar Smadi |
Publisher | : Transportation Research Board National Research |
Total Pages | : 88 |
Release | : 2013 |
Genre | : Beads |
ISBN | : 9780309258906 |
Download Predicting the Initial Retroreflectivity of Pavement Markings from Glass Bead Quality Book in PDF, ePub and Kindle
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 | : |
Total Pages | : 222 |
Release | : 2009 |
Genre | : Road markings |
ISBN | : |
Download Pavement Marking Performance Analysis Book in PDF, ePub and Kindle
This research evaluated pavement marking performance and developed useful degradation models for thermoplastic and paint pavement markings which can help North Carolina meet the pending FHWA minimum retroreflectivity requirements. The impacts of several important factors (such as lateral location, directionality, region, and pavement roughness) on pavement marking retroreflectivity were evaluated. With two large datasets in hand, the authors determined whether these factors had significant impacts on marking retroreflectivity. Image processing techniques were used to analyze pavement marking surface glass bead density. The authors were able to explain why paint marking retroreflectivity values degraded over time by evaluating the impact of bead density on paint marking retroreflectivity. The research reviewed existing marking retroreflectivity degradation models and developed useful new models for both thermoplastic and paint pavement markings in North Carolina. The research presented a transportation asset management system framework for estimating the current and future condition of pavement markings. The research outcomes enable the North Carolina Department of Transportation to have a better understanding of thermoplastic and paint pavement marking performance, which can lead to cost saving by maximizing pavement marking service lifecycles.
Author | : |
Publisher | : |
Total Pages | : 120 |
Release | : 2005 |
Genre | : Automobile driving at night |
ISBN | : |
Download Evaluation of Wet-weather Pavement Markings Book in PDF, ePub and Kindle
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 | : Akshar Patel |
Publisher | : |
Total Pages | : 90 |
Release | : 2021 |
Genre | : Paint |
ISBN | : |
Download A Glass Bead Level Approach to Retro Reflectivity for Pavement Markings Using Rcnn Book in PDF, ePub and Kindle
Author | : Benjamin H. Cottrell |
Publisher | : |
Total Pages | : 28 |
Release | : 1996 |
Genre | : Automobile driving in rain |
ISBN | : |
Download Evaluation of Pavement Markings for Improved Visibility During Wet Night Conditions Book in PDF, ePub and Kindle
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 | : National Cooperative Highway Research Program |
Publisher | : |
Total Pages | : 156 |
Release | : 2009 |
Genre | : Highway research |
ISBN | : |
Download Summary of Progress - National Cooperative Highway Research Program Book in PDF, ePub and Kindle
Author | : Michael J. Markow |
Publisher | : Transportation Research Board |
Total Pages | : 223 |
Release | : 2010 |
Genre | : Business & Economics |
ISBN | : 0309143209 |
Download Pavement Marking Warranty Specifications Book in PDF, ePub and Kindle
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 | : Ronald Bruce Gibbons |
Publisher | : |
Total Pages | : 116 |
Release | : 2004 |
Genre | : Automobile driving in rain |
ISBN | : |
Download Wet Night Visibility of Pavement Markings Book in PDF, ePub and Kindle
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.