Wet Reflective Pavement Marking Demonstration Project PDF Download
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Author | : Neal R. Hawkins |
Publisher | : |
Total Pages | : 154 |
Release | : 2011 |
Genre | : Night vision |
ISBN | : |
Download Wet-reflective Pavement Marking Demonstration Project Book in PDF, ePub and Kindle
One of the leading complaints from drivers is the inability to see pavement markings under wet night conditions. This issue is a major source of dissatisfaction in state department of transportation (DOT) customer satisfaction surveys. Driving under wet night conditions is stressful and fatiguing for all drivers, but particularly so for the more vulnerable young and older driver age groups. This project focused on the development of a two-year, long-line test deck to allow for the evaluation and demonstration of a variety of wet-reflective pavement marking materials and treatments under wet night conditions. Having the opportunity to document the performance of these various products and treatments will assist the Iowa DOT and local agencies in determining when and where the use of these products might be most effective. Performance parameters included durability, presence, retroreflectivity, and wet night visibility. The test sections were located within Story County so that Iowa DOT management and staff, as well as local agencies, could drive these areas and provide input on the products and treatments.
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.
Author | : Ronald Bruce Gibbons |
Publisher | : |
Total Pages | : 47 |
Release | : 2012 |
Genre | : Road markings |
ISBN | : |
Download Assessment of the Durability of Wet Night Visible Pavement Markings Book in PDF, ePub and Kindle
This project encompassed a research effort to establish the durability of pavement markings in an on-road installation. Six marking technologies were installed on a portion of Route 460 in Blacksburg, Virginia. A human factors experiment in natural rain conditions was performed to establish the visibility needs of the driver. The retroreflectivity of the markings was measured at intervals of 2 to 5 months, with six measurements over the course of 23 months. The numbers of snow plow crossings and chemical treatments were also measured. Although all markings lost a considerable amount of retroreflectivity after the first winter, the markings installed in grooves or in rumble strips were shown to retain more retroreflectivity and receive less damage than markings installed on the surface of the roadway. Twenty-three months after installation, the retroreflectivity for all markings in active rain conditions had dropped below the 150 mcd/m2/lx minimum recommended from previous research. The reflective tape was the closest to maintaining the minimum with a mean retroreflectivity of 137mcd/m2/lx in 1 in/hr rain. Several other markings maintained a retroreflectivity above 84 mcd/m2/lx; this may still provide a benefit over standard paint. The study recommends that VDOT's Traffic Engineering Division install pavement markings in grooves or in rumble strips. VDOT will determine where the use of grooves or rumble strips is appropriate. Because pavement marking visibility is more critical for high-speed roadways such as interstate roadways and major arterials, these roads should be the highest priority. Grooved markings may also be desired for high-volume roadways where markings may be exposed to higher levels of wear from traffic. The study markings on Route 460 in Blacksburg should be monitored for two more years. The study team should make the measurements after each winter through 2013 and report the findings to VDOT in a brief report. VDOT staff should perform additional cost-benefit analyses to address standard VDOT policy, procedures, and practices and possible supplier warranties.
Author | : Paul Carlson |
Publisher | : |
Total Pages | : 306 |
Release | : 2012 |
Genre | : Reflective materials |
ISBN | : |
Download Pavement Marking Demonstration Projects Book in PDF, ePub and Kindle
This project evaluates the safety impacts, environmental impacts, and cost effectiveness of different pavement marking systems as well as the effect of State bidding and procurement processes on the quality of pavement marking material employed in highway projects. The findings indicate that States are pursuing alternative procurement strategies to provide high-quality durable markings in a cost effective manner, often as part of a strategic safety plan, while industry has responded to requirements for more environmentally benign materials. A multi-State retrospective crash analysis suggests that the use of 6-inch edge lines reduces several crash types on rural two-lane two-way roads as compared to 4-inch edge lines. The monitored performance of pavement markings installed as part of the demonstration project was used to evaluate pavement marking cost effectiveness. The same results were also used to populate a framework for a pavement marking selection tool.
Author | : U.s. Department of Transportation |
Publisher | : Createspace Independent Publishing Platform |
Total Pages | : 54 |
Release | : 2018-07-23 |
Genre | : |
ISBN | : 9781723490750 |
Download Safety Evaluation of Wet-reflective Pavement Markings Book in PDF, ePub and Kindle
Safety evaluation of wet-reflective pavement markings /
Author | : Craig Lyon |
Publisher | : |
Total Pages | : 54 |
Release | : 2016 |
Genre | : Reflectors (Safety devices) |
ISBN | : |
Download Safety Evaluation of Wet-reflective Pavement Markings Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 8 |
Release | : 2015 |
Genre | : Reflectors (Safety devices) |
ISBN | : |
Download Safety Evaluation of Wet-reflective Pavement Markings Book in PDF, ePub and Kindle
Author | : James Migletz |
Publisher | : Transportation Research Board |
Total Pages | : 165 |
Release | : 2002 |
Genre | : Road markings |
ISBN | : 0309069246 |
Download Long-term Pavement Marking Practices Book in PDF, ePub and Kindle
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 | : Richard G. Griffin |
Publisher | : |
Total Pages | : 19 |
Release | : 1987 |
Genre | : Epoxy resins |
ISBN | : |
Download Epoxy Thermoplastic Pavement Marking Demonstration Project 60 Book in PDF, ePub and Kindle
Author | : Pike. Adam |
Publisher | : |
Total Pages | : 84 |
Release | : 2020 |
Genre | : Reflectors (Safety devices) |
ISBN | : |
Download Pavement Markings - Wet Retroreflectivity Standards Book in PDF, ePub and Kindle
Pavement markings need to be visible to drivers both day and night and in adverse weather conditions such as rain. Markings in good condition typically provide adequate delineation under dry nighttime conditions, but performance is generally reduced in wet-night conditions. Wet reflective pavement markings can provide improved visibility in wet-night conditions. This research project identifies continuous wet retroreflectivity levels to include in Minnesota Department of Transportation (MnDOT) standards based on a comprehensive review of past research, an analysis of available data sources, and a human factors study. The human factors study included 43 participants who evaluate the visual performance of pavement markings with varying levels of retroreflectivity, color, and width in a simulated rain condition. The results indicate that a minimum maintained continuous wet retroreflectivity level of 50 millicandelas per meter squared per lux (mcd/m2/lux) will provide adequate visibility to most drivers. A new install value of 200 mcd/m2/lux is recommended. The new install value is based on anticipated continuous wet retroreflectivity degradation using literature and MnDOT-supplied continuous wet retroreflectivity degradation levels, a desired four-year service life, and the recommended minimum maintained value. These recommendations are not marking width or color dependent..