A Survey of Anti-icing Practice in Virginia PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download A Survey of Anti-icing Practice in Virginia PDF full book. Access full book title A Survey of Anti-icing Practice in Virginia by Daniel S. Roosevelt. Download full books in PDF and EPUB format.
Author: Daniel S. Roosevelt
Publisher:
ISBN:
Category : Deicing chemicals
Languages : en
Pages : 32
Get Book Here
Book Description
This study documents the current Virginia Department of Transportation's anti-icing practice so that development of a coordinated statewide plan for implementing anti-icing technology can be considered. The researcher surveyed VDOT managers to determine who is using anti-icing technology. Based upon the results of the initial survey, the researcher conducted follow-up interviews. This report uses anecdotal survey information to assess the effectiveness of various anti-icing techniques used within VDOT. The report concludes that where anti-icing practice has been implemented on a widespread basis, the results validate the findings of the Federal Highway Administration (FHWA) Study TE 28 and the anti-icing experiences of other states. The report recommends that anti-icing practices for snow removal and ice control be implemented statewide for roads with a bare pavement policy. Initial implementation should focus on pre-wetting technology and the timely distribution of weather information to the area headquarters level. Pilot testing of direct liquid application technology should continue. Anti-icing practices that reduce chemical usage and the cost of snow removal and ice control while maintaining or improving level of service should also be evaluated. Finally, an anti-icing training program should be developed and taught statewide at the area headquarters level to facilitate implementation, improve current application and to transfer this state-of-the-art technology to the private sector.
Author: Daniel S. Roosevelt
Publisher:
ISBN:
Category : Deicing chemicals
Languages : en
Pages : 32
Get Book Here
Book Description
This study documents the current Virginia Department of Transportation's anti-icing practice so that development of a coordinated statewide plan for implementing anti-icing technology can be considered. The researcher surveyed VDOT managers to determine who is using anti-icing technology. Based upon the results of the initial survey, the researcher conducted follow-up interviews. This report uses anecdotal survey information to assess the effectiveness of various anti-icing techniques used within VDOT. The report concludes that where anti-icing practice has been implemented on a widespread basis, the results validate the findings of the Federal Highway Administration (FHWA) Study TE 28 and the anti-icing experiences of other states. The report recommends that anti-icing practices for snow removal and ice control be implemented statewide for roads with a bare pavement policy. Initial implementation should focus on pre-wetting technology and the timely distribution of weather information to the area headquarters level. Pilot testing of direct liquid application technology should continue. Anti-icing practices that reduce chemical usage and the cost of snow removal and ice control while maintaining or improving level of service should also be evaluated. Finally, an anti-icing training program should be developed and taught statewide at the area headquarters level to facilitate implementation, improve current application and to transfer this state-of-the-art technology to the private sector.
Author: Xianming Shi
Publisher: John Wiley & Sons
ISBN: 1119185068
Category : Technology & Engineering
Languages : en
Pages : 476
Get Book Here
Book Description
The first and only comprehensive guide to best practices in winter road operations Winter maintenance operations are essential to ensure the safety, mobility, and productivity of transportation systems, especially in cold-weather climates, and responsible agencies are continually challenged to provide a high level of service in a fiscally and environmentally responsible manner. Sustainable Winter Road Operations bridges the knowledge gaps, providing the first up-to-date, authoritative, single-source overview and guide to best practices in winter road operations that considers the triple bottom line of sustainability. With contributions from experts in the field from around the world, this book takes a holistic approach to the subject. The authors address the many negative impacts on regional economies and the environment of poorly planned and inadequate winter road operations, and they make a strong case for the myriad benefits of environmentally sustainable concepts and practices. Best practice applications of materials, processes, equipment, and associated technologies and how they can improve the effectiveness and efficiency of winter operations, optimize materials usage, and minimize cost, corrosion, and environmental impacts are all covered in depth. Provides the first up-to-date, authoritative and comprehensive overview of best practices in sustainable winter road operations currently in use around the world Covers materials, processes, equipment, and associated technologies for sustainable winter road operations Brings together contributions by an international all-star team of experts with extensive experience in designing, implementing, and managing sustainable winter road operations Designed to bring professionals involved in transportation and highway maintenance and control up to speed with current best practice Sustainable Winter Road Operations is essential reading for maintenance professionals dealing with snow and ice control operations on highways, motorways and local roads. It is a valuable source of information and guidance for decision makers, researchers, and engineers in transportation engineering involved in transportation and highway maintenance. And it is an ideal textbook for advanced-level courses in transportation engineering.
Author:
Publisher:
ISBN:
Category : State government publications
Languages : en
Pages : 216
Get Book Here
Book Description
Author: G. Michael Fitch
Publisher:
ISBN:
Category : Deicing chemicals
Languages : en
Pages : 30
Get Book Here
Book Description
A large part of the Virginia Department of Transportation's (VDOT's) maintenance effort comprises the implementation of its snow removal and ice control program. Earlier research confirmed that VDOT captures significant volumes of salt-laden stormwater runoff at its 300+ salt storage facilities throughout the state and that the disposal options for this water are limited and costly. Although VDOT is implementing recommended management options to reduce the quantity of salt water captured, this research was undertaken to determine the possibility of recycling salt-contaminated stormwater runoff for the purpose of producing brine that can be used for pre-wetting of granular NaCl and direct application. Laboratory and field tests were conducted using bench-scale brine generation equipment. In the laboratory phase, brine was produced using tap water while hydraulic retention times and water temperatures were varied to determine how these changes would affect the quantity and quality of brine production. Stormwater runoff from a storage pond without any previous treatment was used in the field phase to allow a better estimate of the potential effects of stormwater on the quality of the brine generated. Results showed that the optimum conditions for brine production were low hydraulic retention time (high flow rates) and high temperatures. The total suspended solids present in the stormwater runoff did not diminish the quality of the brine in the field tests. Based on historic precipitation and chemical application data, VDOT appears to capture sufficient volumes of water to meet the majority of its potential brine production needs. Further, significant economic benefits can be obtained by applying this recycling strategy, with the greatest benefits resulting from generating brine for both direct application and pre-wetting. Assuming average stormwater volume collection and average total NaCl application, VDOT can save approximately $3 million each year by generating brine for pre-wetting only versus approximately $6.5 million each year by generating brine for the combination of pre-wetting and direct application.
Author:
Publisher:
ISBN:
Category : Cold regions
Languages : en
Pages : 550
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 732
Get Book Here
Book Description
Author: Gayle F. Mitchell
Publisher:
ISBN:
Category : Deicing chemicals
Languages : en
Pages : 324
Get Book Here
Book Description
The Ohio Department of Transportation (ODOT) has initiated pretreatment as an integral part of a winter management strategy. Currently forty gallons per lane mile of 23% salt brine (NaCl) by weight is applied at a minimum frequency of two times per week when conditions warrant. In order for ODOT to develop the most effective plan for pretreatment, an in-situ study to provide data on decay of brine on trafficked pavement was needed. Objectives included a survey of other state DOT's pretreatment protocols, laboratory studies to discern brine concentrations that precluded ice formation, brine decay with traffic and time on several pavements, and correlation of laboratory and field data. Ten of the 28 state DOTs responding to the survey regarding pretreatment protocol applied NaCl two to 24 hours prior to a storm; two states used surface type, traffic volume, and air temperatures for decision making. The survey reinforced the need of laboratory and field studies. In the laboratory, release temperatures of the ice/surface bond at various brine concentrations were obtained utilizing conductivity and physical observation techniques. Laboratory tests with the field brine measurement instrumentation (SOBO-20 by Boschung Megatronic AG) provided correction factors for the field data on AC and PCC pavements. Sodium chloride brine was applied and measured in-situ in mass per area at five field sites (ATH-50 PCC, ATH-50 AC, DEL-23 PCC, DEL-23 AC, and ATH-33 AC) encompassing at least four sections at each site. Initial losses and decay due to time/traffic were obtained. Of the five test sites, AC (micro seal), AC (NOVA chip), and a transversely grooved PCC pavement provided statistically valid data to develop residual decay equations as a function of time/traffic. Field decay of brine was incorporated into laboratory brine/ice/specimen bonding temperature findings to determine the effective ice prevention temperatures as a function of time/traffic for AC and PCC at standard application rates.
Author: Don Murray
Publisher:
ISBN:
Category : Deicing chemicals
Languages : en
Pages : 144
Get Book Here
Book Description
Author: L. David Minsk
Publisher:
ISBN:
Category : Deicing chemicals
Languages : en
Pages : 46
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 768
Get Book Here
Book Description
