Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Evaluation Of Ice Detection And Highway Weather Information Services
Download Evaluation Of Ice Detection And Highway Weather Information Services full books in PDF, epub, and Kindle. Read online Evaluation Of Ice Detection And Highway Weather Information Services ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Evaluation of Ice Detection and Highway Weather Information Services by : J. H. DeFoe
Download or read book Evaluation of Ice Detection and Highway Weather Information Services written by J. H. DeFoe and published by . This book was released on 1992 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ice Detection and Highway Weather Information Systems by :
Download or read book Ice Detection and Highway Weather Information Systems written by and published by . This book was released on 1993 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Ice Detection and Weather Information Systems by : J. H. DeFoe
Download or read book Evaluation of Ice Detection and Weather Information Systems written by J. H. DeFoe and published by . This book was released on 1990 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Book Synopsis Ice Detection and Highway Weather System for the Kansas Department of Transportation by :
Download or read book Ice Detection and Highway Weather System for the Kansas Department of Transportation written by and published by . This book was released on 1996 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ice Detection and Highway Weather Information Systems by : David B. Woodham
Download or read book Ice Detection and Highway Weather Information Systems written by David B. Woodham and published by . This book was released on 1993 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Surface Transportation Publisher : ISBN 13 : Total Pages :822 pages Book Rating :4.:/5 (327 download)
Book Synopsis The National Highway System and Ancillary Issues Relating to Highway and Transit Programs by : United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Surface Transportation
Download or read book The National Highway System and Ancillary Issues Relating to Highway and Transit Programs written by United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Surface Transportation and published by . This book was released on 1994 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ice Detection and Road Weather Information Systems by : Ottawa-Carleton (Ont.). Transportation Department. Operations Research Section
Download or read book Ice Detection and Road Weather Information Systems written by Ottawa-Carleton (Ont.). Transportation Department. Operations Research Section and published by . This book was released on 1985 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ice-detection System Evaluation by : David B. Woodham
Download or read book Ice-detection System Evaluation written by David B. Woodham and published by . This book was released on 1991 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Better Snow and Ice Control Using State-of-the-art Technologies by :
Download or read book Better Snow and Ice Control Using State-of-the-art Technologies written by and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses various programs designed to minimize road hazards caused by winter weather, and invites participation in the programs during 1996 discussion workshops. Contact information is provided.
Book Synopsis Road Weather Information System Decision Support Tool by : Carl Haas
Download or read book Road Weather Information System Decision Support Tool written by Carl Haas and published by . This book was released on 1997 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Road Weather Information Systems: Implementation guide by :
Download or read book Road Weather Information Systems: Implementation guide written by and published by . This book was released on 1993 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Strategic Highway Research Program sponsored research into the use of road weather information systems (RWIS) for highway snow and ice control. The research indicated that the use of RWIS technologies can improve the efficiency and effectiveness as well as reduce the costs of highway winter maintenance practices. Volume 2, the implementation guide supplements Volume 1, the research report, which documents the research.
Book Synopsis Evaluation of ODOT Roadway/weather Sensor Systems for Snow and Ice Removal Operations by :
Download or read book Evaluation of ODOT Roadway/weather Sensor Systems for Snow and Ice Removal Operations written by and published by . This book was released on 2003 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Road Weather Information System (RWIS) pavement sensors from three vendors were evaluated under controlled conditions in a climate chamber. The chamber had a maximum cooling rate of about 5.6°C in the first 15 minutes (about 15.8°C in the first hour) and could cool from a room temperature of about 22°C to a minimum temperature of approximately -17°C in about 15 hours. One vendor supplied an active (cooling/heating cycle) sensor with an active-passive sensor as a combined system, and the other two supplied passive sensors. Each sensor was installed in a concrete block cut from a bridge deck and positioned in a large climate-controlled chamber. The sensors were tested for accuracy and precision of temperature, freezing point determination, chemical percentage or index, surface status, and liquid depth, where appropriate. Testing parameters included salt type (pure water, 7%, 13%, & 19% NaCl in water, 17% & 30% CaCl2 in water, and two mixtures of the two salts in solution), and liquid depth (0.5 mm, 1.5 mm, 3 mm, 6 mm). The temperature in the chamber was reduced until the liquid froze or a minimum temperature below -15°C was attained. Independent temperature probes were placed on and near the block for comparison to sensor readings. Results obtained for the three sensors varied considerably. The surface status (wet/dry) reported by Vendor C's sensor was accurate at the beginning of each run 100% of the time, but accurate only 81% of the time at the end of the run. For Vendor A the corresponding accuracy rates were 97% and 92%. Vendor B's more detailed scheme was accurate only 19% of the time at the beginning of each run and 47% at the end. The surface temperature reported by each passive or active-passive sensor during cooling of the climate chamber was found to lag behind that measured by the independent probes placed in the liquid and on the surface of the block. The average maximum lag in temperature and the average time at which it was observed for each vendor were: Vendor A: 5.6°C at 150 minutes, Vendor B: 4.0°C at 157 minutes, and Vendor C: 7.0°C at 128 minutes. Vendor A's active sensor freezing point values varied considerably from expected values, and also changed during runs. The chemical percentage reported by Vendor B's passive sensor showed an appropriate variation with NaCl concentration, though at higher concentrations the initial reported concentration was low; this bias was also reflected in the freezing point values computed by the system. Percentages were less accurate with CaCl2 or NaCl-CaCl2 mixtures, for which the system was not calibrated. Vendor C's chemical index did not appear to correlate with salt concentration at all. Because of these results, none of these sensors in their present state is recommended for use at the present time. Any future sensor deployment should be contingent on the ability of the chosen sensor to perform those functions considered necessary by ODOT.
Book Synopsis Evaluation of ODOT Roadway/weather Sensor Systems for Snow & Ice Removal Operations/RWIS. by : Gayle F. Mitchell
Download or read book Evaluation of ODOT Roadway/weather Sensor Systems for Snow & Ice Removal Operations/RWIS. written by Gayle F. Mitchell and published by . This book was released on 2006 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study addressed pretreatment protocol for winter maintenance of roadways using brine. Information regarding pretreatment was assessed from surveys of personnel in state departments of transportation and county garages in Ohio. Field durability studies of various applications of brine were conducted on Portland cement concrete and asphalt concrete pavements in Ohio. Over three winter seasons, weather events and resulting pavement conditions were documented during pretreatment and during the subsequent events using visual and limited road grip tester (RGT) assessment. In addition, extensive laboratory studies were undertaken to supplement the field investigations. Integration of the findings resulted in a decision tree to aid in operational planning and pretreatment.
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Ontario. Ministry of Transportation and Communications. Research and Development Branch Publisher :Downsview, Ont. : Ministry of Transportation and Communication, Research and Development Branch ISBN 13 : Total Pages :98 pages Book Rating :4.:/5 (222 download)
Book Synopsis Ice Detection and Road Weather Information Systems : a State of the Art Report by : Ontario. Ministry of Transportation and Communications. Research and Development Branch
Download or read book Ice Detection and Road Weather Information Systems : a State of the Art Report written by Ontario. Ministry of Transportation and Communications. Research and Development Branch and published by Downsview, Ont. : Ministry of Transportation and Communication, Research and Development Branch. This book was released on 1987 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Implementation of the National Intelligent Transportation Systems Program by : United States. Federal Highway Administration
Download or read book Implementation of the National Intelligent Transportation Systems Program written by United States. Federal Highway Administration and published by . This book was released on 1996 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: