Evaluation Of Wet Weather Pavement Markings
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Evaluation Of Wet Weather Pavement Markings
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Author :
language : en
Publisher:
Release Date : 2005
Evaluation Of Wet Weather Pavement Markings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Automobile driving at night categories.
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.
Evaluation Of Wet Weather And Contrast Pavement Markings Applications
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Author :
language : en
Publisher:
Release Date : 2007
Evaluation Of Wet Weather And Contrast Pavement Markings Applications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Automobile driving at night categories.
This report contains the Phase II effort on wet-night pavement markings, a benefit-cost analysis, and a study of contrast markings. Phase II effort consisted of expanding the study design from Phase I to include additional wet-night pavement marking products, the effects of glare and dry pavement on detection distances, and a benefit-cost analysis with respect to the use of different pavement marking systems to accommodate drivers under wet-night conditions.
Safety Evaluation Of Permanent Raised Pavement Markers
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Author : Geni Brafman Bahar
language : en
Publisher: Transportation Research Board
Release Date : 2004
Safety Evaluation Of Permanent Raised Pavement Markers written by Geni Brafman Bahar and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Technology & Engineering categories.
Evaluation Of Pavement Markings For Improved Visibility During Wet Night Conditions
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Author : Benjamin H. Cottrell
language : en
Publisher:
Release Date : 1996
Evaluation Of Pavement Markings For Improved Visibility During Wet Night Conditions written by Benjamin H. Cottrell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Automobile driving in rain categories.
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.
Pavement Marking Visibility Requirements During Wet Night Conditions
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Author : Ronald Bruce Gibbons
language : en
Publisher:
Release Date : 2006
Pavement Marking Visibility Requirements During Wet Night Conditions written by Ronald Bruce Gibbons and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Automobile driving at night categories.
This study investigated the performance of pavement markings in wet night conditions. Typically, performance will decrease in wet conditions. The degradation is a result of flooding of the marking optics and a change in the optical media, thereby reducing retroreflectivity and the visibility distance. Several technologies are available to improve the visibility of markings under wet conditions. This study used four technologies and evaluated them in a dynamic situation. In the experiment, vehicles were driven by older participants and visibility was measured based on the detection distances of the beginning or ending of a continuous edge marking. The results indicate that a specifically designed wet retroreflective tape performed better than the currently used paint and glass bead technology. Paint with large glass beads and profiled thermoplastics also showed an improvement over the standard paint and glass bead technology. A relationship between retroreflectivity and the detection distance was found, which was used to postulate a minimum required value for visibility during wet night conditions. A value of 200 mcd/m2/lx appears to provide a reasonable detection distance for a minimum performance requirement.
Long Term Pavement Marking Practices
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Author : James Migletz
language : en
Publisher: Transportation Research Board
Release Date : 2002
Long Term Pavement Marking Practices written by James Migletz and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Technology & Engineering categories.
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.
High Performance Traffic Markings In Wet Weather
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Author : Pan Liu
language : en
Publisher:
Release Date : 2007
High Performance Traffic Markings In Wet Weather written by Pan Liu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Automobile driving in rain categories.
Wet Night Visibility Of Pavement Markings
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Author : Ronald Bruce Gibbons
language : en
Publisher:
Release Date : 2004
Wet Night Visibility Of Pavement Markings written by Ronald Bruce Gibbons and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Automobile driving in rain categories.
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.
Effective Removal Of Pavement Markings
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Author : Adam Matthew Pike
language : en
Publisher: Transportation Research Board
Release Date : 2013
Effective Removal Of Pavement Markings written by Adam Matthew Pike and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Transportation categories.
"TRB's National Cooperative Highway Research Program (NCHRP) Report 759: Effective Removal of Pavement Markings aids in the selection of safe, cost-effective, and environmentally acceptable practices for the removal of work zone and permanent pavement markings. The practices highlighted in this report emphasize minimal damage to the underlying pavement or visible character of the surface course." -- Publisher's description
Perspectives And Strategies For Promoting Safe Transportation Among Older Adults
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Author : David W. Eby
language : en
Publisher: Elsevier
Release Date : 2018-11-27
Perspectives And Strategies For Promoting Safe Transportation Among Older Adults written by David W. Eby and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-27 with Transportation categories.
Promoting Safe Transportation among Older Adults: Perspectives and Strategies provides a concise, comprehensive, and up-to-date resource on safe mobility for an aging population. The book offers an interdisciplinary perspective for understanding and influencing the behavior of older adults with regard to their safe transportation. It is organized around the professions and disciplines that have a stake in the safe transportation of older adults and the role they play at each stage of their mobility needs. The book also addresses the various strategies that have been used to help keep older adults safe and mobile. Readers will find great insights on key issues related to aging and mobility, giving them an overarching framework for how to maintain safe mobility into older adulthood. The book enables readers to understand the perspectives of the critical groups of people involved in keeping older people safe and explores existing strategies by which an aging individual can maintain safe mobility. - Utilizes a multidisciplinary, evidence-based approach for examining the complexities of transportation for older adults - Offers an integrated, overarching narrative for understanding the key issues of safety and mobility in our aging society - Written by leading transportation and health scholars - Offers insights into the perspectives of all the stakeholders, such as hands-on transportation and health practitioners, students of varying levels, researchers and policymakers