Evaluation Of Odot Roadway Weather Sensor Systems For Snow Ice Removal Operations

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Evaluation of ODOT Roadway/weather Sensor Systems for Snow & Ice Removal Operations

Author : Helmut T. Zwahlen
Publisher :
ISBN 13 :
Total Pages : 190 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Evaluation of ODOT Roadway/weather Sensor Systems for Snow & Ice Removal Operations by : Helmut T. Zwahlen

Download or read book Evaluation of ODOT Roadway/weather Sensor Systems for Snow & Ice Removal Operations written by Helmut T. Zwahlen and published by . This book was released on 2006 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major objective of the study was to develop a procedure to determine the level of service using the RWIS speed measurements. The procedure developed can be used by ODOT to evaluate winter maintenance activities and for winter maintenance decision making. Average traffic speeds for five minute intervals were measured using NuMetrics road sensors and they were related to the pavement and driving conditions. In addition speed data from two other studies was used. The pavement conditions were determined by conducting surveys at rest area buildings using a questionnaire form. It was found that the average traffic speeds were significantly lower during a major snow event even when periodic plowing and salting was done. The average speeds decreased almost linearly for the period of the snow storm reached the minimum and then climbed back slowly towards higher speeds. The speeds appear to be a fairly sensitive measure to judge the condition of the pavement. The motorist judgments about the pavement condition and their perception of the safety of driving decreases during a rather severe winter storm which is mirrored in the speed decrease. It appears from the survey that about two thirds of the motorists judge the deterioration of the road conditions and the inadequate level of road maintenance during a winter storm as bad or moderately bad. The responses obtained for the car and the truck drivers are fairly close to each other indicating that both groups can judge bad road condition equally well. The observed road conditions appear to influence the drivers in terms of how they subjectively feel about the level of safety and stress experienced during driving in the winter storm. A simple procedure was developed for winter maintenance management to determine the condition of the road (freeways) based on the average speeds observed by the RWIS sensors. If the average winter speed of the traffic is equal or greater than the historical established wet/salted pavement speed, the level of service is considered adequate. According to the Swiss study, the wet/salted surface winter speeds are about 85% of the dry surface speeds for freeways and 96 % for city streets. If the average winter speed is below the wet/salted surface speed, the level of service is considered inadequate. Any speed less than 50% of the wet/salted surface speed indicates fairly bad road conditions and an extremely inadequate level of service. It should be noted that the winter pavement conditions can be highly dynamic. Depending on the rate of accumulation of snow, frequency of the snow plowing, length of the snow plow route, the pavement condition can improve and deteriorate a number of times during a winter storm. The level of service can get worse even with maximum snow plowing and salting effort in a situation with a high rate of snow accumulation. The winter speeds observed as a percentage of the average dry surface speed can be correlated with the level of service. A relatively more fine graduation of the level of service as a function of the percentage of the average dry surface speed is proposed in the recommendations of the report.

Evaluation of ODOT Roadway/weather Sensor Systems for Snow and Ice Removal Operations

Author : Gayle F. Mitchell
Publisher :
ISBN 13 :
Total Pages : 324 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Evaluation of ODOT Roadway/weather Sensor Systems for Snow and Ice Removal Operations by : Gayle F. Mitchell

Download or read book Evaluation of ODOT Roadway/weather Sensor Systems for Snow and Ice Removal Operations written by Gayle F. Mitchell and published by . This book was released on 2003 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Winter Highway Operations

Author : Steven M. Conger
Publisher : Transportation Research Board
ISBN 13 : 0309097479
Total Pages : 76 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Winter Highway Operations by : Steven M. Conger

Download or read book Winter Highway Operations written by Steven M. Conger and published by Transportation Research Board. This book was released on 2005 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 344: Winter Highway Operations examines changes that occurred between 1994 and 2004 to practices and strategies used to control the impacts of winter weather on the safe and efficient movement of traffic.

Ohio Documents

Author :
Publisher :
ISBN 13 :
Total Pages : 94 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Ohio Documents by :

Download or read book Ohio Documents written by and published by . This book was released on 2003 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Non-Destructive Material Characterization Methods

Author : Akira Otsuki
Publisher : Elsevier
ISBN 13 : 0323984789
Total Pages : 842 pages
Book Rating : 4.3/5 (239 download)

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Book Synopsis Non-Destructive Material Characterization Methods by : Akira Otsuki

Download or read book Non-Destructive Material Characterization Methods written by Akira Otsuki and published by Elsevier. This book was released on 2023-09-01 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-Destructive Material Characterization Methods provides readers with a trove of theoretical and practical insight into how to implement different non-destructive testing methods for effective material characterization. The book starts with an introduction to the field before moving right into a discussion of a wide range of techniques that can be immediately implemented. Various imaging and microscopy techniques are first covered, with step-by-step insights on characterization using a polarized microscope, an atomic force microscope, computed tomography, ultrasonography, magnetic resonance imaging, infrared tomography, and more. Each chapter includes case studies, applications, and recent developments. From there, elemental assay and mapping techniques are discussed, including Raman spectroscopy, UV spectroscopy, atomic absorption spectroscopy, neutron activation analysis, and various others. The book concludes with sections covering displacement measurement techniques, large-scale facility techniques, and methods involving multiscale analysis and advanced analysis. - Provides an overview of a wide-range of NDT material characterization methods, strengths and weaknesses of these methods, when to apply them, and more - Includes eddy current sensing and imaging, ultrasonic sensing and imaging, RF and THz imaging, internet and cloud-based methods, among many others - Presents case studies, applications and other insights on putting these methods into practice

Strategies to Mitigate the Impacts of Chloride Roadway Deicers on the Natural Environment

Author : Laura Fay
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Strategies to Mitigate the Impacts of Chloride Roadway Deicers on the Natural Environment by : Laura Fay

Download or read book Strategies to Mitigate the Impacts of Chloride Roadway Deicers on the Natural Environment written by Laura Fay and published by . This book was released on 2013 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 449 : Strategies to Mitigate the Impacts of Chloride Roadway Deicers on the Natural Environment documents the range of methods, tools, and techniques used by transportation agencies to minimize the environmental impact of chloride-based roadway deicers"--Publisher's description.

Future Direction of the Roadway Weather Information System (RWIS) at PennDOT

Author : Gannett Fleming, Inc
Publisher :
ISBN 13 :
Total Pages : 250 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Future Direction of the Roadway Weather Information System (RWIS) at PennDOT by : Gannett Fleming, Inc

Download or read book Future Direction of the Roadway Weather Information System (RWIS) at PennDOT written by Gannett Fleming, Inc and published by . This book was released on 2007 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Effectiveness of RWIS Bridge Temperature Simulators

Author :
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Effectiveness of RWIS Bridge Temperature Simulators by :

Download or read book Effectiveness of RWIS Bridge Temperature Simulators written by and published by . This book was released on 2007 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge deck simulators (BDSs), 6 in. (15 cm) concrete cubes with an embedded temperature probe, are intended as a cost-effective substitute for RWIS pavement sensors to represent conditions likely on bridge decks in an area near an RWIS station. In this study, the effectiveness of the BDSs to predict the temperature on nearby bridge decks was evaluated. Nine sites were selected by ODOT across the state of Ohio (six in northeastern region and three in southwestern region) which were instrumented with BDSs and Nu Metrics pavement sensors on the bridge deck and (with one exception) on the road surface off the bridge. The use of BDSs appears to be unique to Ohio. A survey in the state of Ohio indicated little use was being made of BDS information. RWIS temperature data collected at five minute intervals during winter season 2004-2005 were analyzed and the unusable data were weeded out by removing redundant entries, blank or incomplete entries, extreme temperature readings, and entries where sensor data were not updated. Correlation analysis was performed on the "cleaned" data from the nine sites for the air and BDS temperatures versus bridge deck and road temperatures, and also for air versus BDS temperatures. Separate correlations were made with all-day data and with nighttime data free of solar radiation effects. For both all-day and nighttime data, the BDS was found to better correlate with bridge deck and road temperatures than was the air temperature. The nighttime data were then further analyzed to determine 90%, 95%, 99% prediction limits for the prediction of bridge deck and road temperatures based on the BDS and air temperature values. Again, the prediction limits for bridge and road temperatures using the BDS were generally tighter than when using air temperature. Finite element analyses (FEA) were performed for the nine sites using ALGOR V18 software to investigate the temperature behavior of the bridge deck and the BDS for the air temperature profiles reflecting extreme positive and negative temperature gradients recorded at each site. The FEA modeling provided information about how the BDS and the bridge deck temperature change as a function of the air temperature and time. Larger concrete cube sizes, up to 24 in. (61 cm) on a side, were investigated with FEA in an exploratory manner. The 24 in. (61 cm) cube almost exactly matched the simulated bridge deck temperature profiles under a variety of air temperature loads. The FEA temperature profiles showed that the existing BDS does not always closely represent the true temperature behavior of the bridge deck, but that a concrete cube 4 times larger on a side would compare much better. Yearly training of maintenance personnel in the use of the BDS and RWIS is recommended

Monitoring and Improving Roadway Surface Conditions for Safe Driving Environment and Sustainable Infrastructure

Author : Ching-Yao Chan
Publisher :
ISBN 13 :
Total Pages : 334 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Monitoring and Improving Roadway Surface Conditions for Safe Driving Environment and Sustainable Infrastructure by : Ching-Yao Chan

Download or read book Monitoring and Improving Roadway Surface Conditions for Safe Driving Environment and Sustainable Infrastructure written by Ching-Yao Chan and published by . This book was released on 2012 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Toward the goal of reducing collisions while maintaining the integrity and sustainability of roadways, separate projects in both France and California in recent years have been developed to achieve the following objectives: evaluating the effectiveness of."--Documentation page abstract.

Concepts for Managing Freeway Operations During Weather Events

Author :
Publisher :
ISBN 13 :
Total Pages : 186 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Concepts for Managing Freeway Operations During Weather Events by :

Download or read book Concepts for Managing Freeway Operations During Weather Events written by and published by . This book was released on 2007 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this research was to help the Texas Department of Transportation (TxDOT) develop a structured, systematic approach for managing traffic during weather events. The focus in this research project was on common weather events - such as fog, high winds, heavy rains, and snow and ice storms - that impact traffic operations day-to-day. First, the authors conducted a survey of selected TxDOT districts to determine what information traffic management center (TMC) operators need to manage traffic operations during weather events. Through a review of the existing literature, the authors assessed systems and technologies that other states have deployed to manage traffic during weather-related events. They reviewed the current state of weather-related detection and monitoring technologies. Using historical traffic detector and weather information, they assessed the magnitude of the impact of different weather events on traffic operations. Using all this information, the authors developed concepts of operations for how TMC operators should respond to different types of weather-related events, including limited visibility conditions, ponding and flash flooding, high winds, severe thunderstorms, tornados, and winter storms. They developed a catalog of advisory, control, and treatment strategies (or ACTS) that operators could use to manage traffic operations during weather events.

Synthesis of Highway Practice

Author : National Cooperative Highway Research Program
Publisher :
ISBN 13 :
Total Pages : 694 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Synthesis of Highway Practice by : National Cooperative Highway Research Program

Download or read book Synthesis of Highway Practice written by National Cooperative Highway Research Program and published by . This book was released on 2005 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Synthesis of Pavement Issues Related to High-speed Corridors

Author : Joe W. Button
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Synthesis of Pavement Issues Related to High-speed Corridors by : Joe W. Button

Download or read book Synthesis of Pavement Issues Related to High-speed Corridors written by Joe W. Button and published by . This book was released on 2004 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research project was to produce a synthesis of available information to support specific areas related to pavements for the safe, economical development of the Trans Texas Corridor (TTC). This synthesis is divided into nine sections, each of which deals with a specific topic or topics. These specific areas include (1) pavement design for heavy vehicles, (2) pavement design for light vehicles, (3) skid resistance issues on high-speed corridors, (4) issues related to traffic characterization, (5) smart pavements for high-speed corridors, (6) pavement material response to dynamic loads and performance prediction, (7) safety issues related to splash and spray, and (8) ride quality for high-speed corridors. Regarding these stated issues, this synthesis recommends state-of-the-art technology to the Texas Department of Transportation (TxDOT) for use during development of the TTC. It provides recommendations for future research to fill gaps in knowledge and to take emerging technology to the stage where it can be implemented during the design and construction of the TTC pavements. This is the first synthesis study to address issues related to the TTC. A secondary objective of this project was to determine if additional synthesis studies in other areas of transportation related to the TTC should be conducted and, if so, how the process might be improved. This synthesis recommends that future syntheses should be more focused on specific, maybe critical, issue(s); the researcher should be instructed to present only those findings that are really new, innovative, and potentially implementable. One element of the study should pursue non-transportation related technology that might be adapted to transportation issues.

Sustainable Winter Road Operations

Author : Xianming Shi
Publisher : John Wiley & Sons
ISBN 13 : 1119185068
Total Pages : 476 pages
Book Rating : 4.1/5 (191 download)

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Book Synopsis Sustainable Winter Road Operations by : Xianming Shi

Download or read book Sustainable Winter Road Operations written by Xianming Shi and published by John Wiley & Sons. This book was released on 2018-08-27 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Snow Removal and Ice Control Technology

Author : National Research Council (U.S.). Transportation Research Board
Publisher : Transportation Research Board
ISBN 13 : 9780309062169
Total Pages : 180 pages
Book Rating : 4.0/5 (621 download)

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Book Synopsis Snow Removal and Ice Control Technology by : National Research Council (U.S.). Transportation Research Board

Download or read book Snow Removal and Ice Control Technology written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board. This book was released on 1997 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the symposium was to provide a forum for the exchange of information about state-of-the-art research and technology applications to improve snow removal and ice control operations in transportation systems. Sixty-one papers were presented in the areas of policy and management, infrastructure and snow control, materials and applications, equipment, travel surface, environment and health, road weather information systems and forecasting, and safety and visibility. Papers were authored by maintenance engineers and researchers from Austria, the Czech Republic, Denmark, Finland, Germany, Japan, New Zealand, the Netherlands, Norway, Russia, Sweden, the United Kingdom, and the United States. Twenty-one of these papers are included in this publication.

Path Problems in Networks

Author : John S. Baras
Publisher : Morgan & Claypool Publishers
ISBN 13 : 1598299239
Total Pages : 78 pages
Book Rating : 4.5/5 (982 download)

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Book Synopsis Path Problems in Networks by : John S. Baras

Download or read book Path Problems in Networks written by John S. Baras and published by Morgan & Claypool Publishers. This book was released on 2009-10-15 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: The algebraic path problem is a generalization of the shortest path problem in graphs. Various instances of this abstract problem have appeared in the literature, and similar solutions have been independently discovered and rediscovered. The repeated appearance of a problem is evidence of its relevance. This book aims to help current and future researchers add this powerful tool to their arsenal, so that they can easily identify and use it in their own work. Path problems in networks can be conceptually divided into two parts: A distillation of the extensive theory behind the algebraic path problem, and an exposition of a broad range of applications. First of all, the shortest path problem is presented so as to fix terminology and concepts: existence and uniqueness of solutions, robustness to parameter changes, and centralized and distributed computation algorithms. Then, these concepts are generalized to the algebraic context of semirings. Methods for creating new semirings, useful for modeling new problems, are provided. A large part of the book is then devoted to numerous applications of the algebraic path problem, ranging from mobile network routing to BGP routing to social networks. These applications show what kind of problems can be modeled as algebraic path problems; they also serve as examples on how to go about modeling new problems. This monograph will be useful to network researchers, engineers, and graduate students. It can be used either as an introduction to the topic, or as a quick reference to the theoretical facts, algorithms, and application examples. The theoretical background assumed for the reader is that of a graduate or advanced undergraduate student in computer science or engineering. Some familiarity with algebra and algorithms is helpful, but not necessary. Algebra, in particular, is used as a convenient and concise language to describe problems that are essentially combinatorial. Table of Contents: Classical Shortest Path / The Algebraic Path Problem / Properties and Computation of Solutions / Applications / Related Areas / List of Semirings and Applications

Guide for Pavement Friction

Author :
Publisher : AASHTO
ISBN 13 : 1560514280
Total Pages : 87 pages
Book Rating : 4.5/5 (65 download)

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Book Synopsis Guide for Pavement Friction by :

Download or read book Guide for Pavement Friction written by and published by AASHTO. This book was released on 2008 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains guidelines and recommendations for managing and designing for friction on highway pavements. The contents of this report will be of interest to highway materials, construction, pavement management, safety, design, and research engineers, as well as others concerned with the friction and related surface characteristics of highway pavements.

Transportation Planning Handbook

Author : ITE (Institute of Transportation Engineers)
Publisher : John Wiley & Sons
ISBN 13 : 1118762355
Total Pages : 1204 pages
Book Rating : 4.1/5 (187 download)

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Book Synopsis Transportation Planning Handbook by : ITE (Institute of Transportation Engineers)

Download or read book Transportation Planning Handbook written by ITE (Institute of Transportation Engineers) and published by John Wiley & Sons. This book was released on 2016-08-01 with total page 1204 pages. Available in PDF, EPUB and Kindle. Book excerpt: A multi-disciplinary approach to transportation planning fundamentals The Transportation Planning Handbook is a comprehensive, practice-oriented reference that presents the fundamental concepts of transportation planning alongside proven techniques. This new fourth edition is more strongly focused on serving the needs of all users, the role of safety in the planning process, and transportation planning in the context of societal concerns, including the development of more sustainable transportation solutions. The content structure has been redesigned with a new format that promotes a more functionally driven multimodal approach to planning, design, and implementation, including guidance toward the latest tools and technology. The material has been updated to reflect the latest changes to major transportation resources such as the HCM, MUTCD, HSM, and more, including the most current ADA accessibility regulations. Transportation planning has historically followed the rational planning model of defining objectives, identifying problems, generating and evaluating alternatives, and developing plans. Planners are increasingly expected to adopt a more multi-disciplinary approach, especially in light of the rising importance of sustainability and environmental concerns. This book presents the fundamentals of transportation planning in a multidisciplinary context, giving readers a practical reference for day-to-day answers. Serve the needs of all users Incorporate safety into the planning process Examine the latest transportation planning software packages Get up to date on the latest standards, recommendations, and codes Developed by The Institute of Transportation Engineers, this book is the culmination of over seventy years of transportation planning solutions, fully updated to reflect the needs of a changing society. For a comprehensive guide with practical answers, The Transportation Planning Handbook is an essential reference.