Download or read book Optimal Placement of Point Detectors on Virginia s Freeways written by and published by . This book was released on 2008 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Virginia, point detectors in the Northern Virginia and Hampton Roads regions are placed at approximately 1/2 mile spacing. This density is a product of early requirements for incident detection that have proven ineffective and perhaps unnecessary. There are other important uses of the data that likely have different requirements for detector placement than the original incident detection focus. For example, there is a desire to derive travel time estimates from the point detector data for the purpose of performance monitoring. To do this, the detectors are to be placed so as to effectively sample the conditions on a freeway. Unfortunately, little guidance exists on how to place detectors for effective sampling. The purpose of this research project was to develop a decision support methodology to identify the optimal locations of a finite set of point detectors on a freeway corridor in order to minimize the error in travel time estimation, within the constraints of available capital and maintenance funding. Case studies of freeway sections in three regions were conducted to demonstrate the utility of the newly developed tool. While there are potentially other important uses of the data collected by freeway point detectors, the recommendations in this report deal specifically with the issue of travel time estimation. The investigators found that the placement of detectors for the development of accurate travel time estimates will vary by location based on specific conditions. Arbitrary, evenly spaced detectors do not necessarily result in accurate travel time estimates. With carefully placed detectors that are well maintained, travel time estimates can be derived with an acceptable level of accuracy from point detection, under incident-free travel conditions. The methods developed in this research effort including the GPS data collection and the mathematical tool are effective in determining preferred detector locations when the objective is to minimize travel time estimate error. There is evidence that VDOT can reduce the number of detectors that are currently maintained by TMCs and can deploy far fewer than the 1/2 mile spacing guidelines, resulting in significant cost savings in both capital and operations and maintenance costs. Using the results of the Northern Virginia case study on I-66 EB where there are 20 detector stations currently deployed, the tool identified minimum travel time errors when data are assumed to be coming from 11 of those stations, a reduction of 45%. Data from VDOT's Traffic Monitoring System place the ongoing cost of a detector station at approximately $10,500. That results in an annual savings of $94,500 for this 11-mile roadway segment alone.

Download or read book Routledge Handbook of Transportation written by Dusan Teodorovic and published by Routledge. This book was released on 2015-08-20 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Routledge Handbook of Transportation offers a current and comprehensive survey of transportation planning and engineering research. It provides a step-by-step introduction to research related to traffic engineering and control, transportation planning, and performance measurement and evaluation of transportation alternatives. The Handbook of Transportation demonstrates models and methods for predicting travel and freight demand, planning future transportation networks, and developing traffic control systems. Readers will learn how to use various engineering concepts and approaches to make future transportation safer, more efficient, and more sustainable. Edited by Dušan Teodorović and featuring 29 chapters from more than 50 leading global experts, with more than 200 illustrations, the Routledge Handbook of Transportation is designed as an invaluable resource for professionals and students in transportation planning and engineering.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book INFORMS Annual Meeting written by Institute for Operations Research and the Management Sciences. National Meeting and published by . This book was released on 2008 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Urban System Operation and Freeways written by National Research Council (U.S.). Transportation Research Board and published by . This book was released on 1978 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Public Roads written by and published by . This book was released on 2005 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transportation Research Record written by and published by . This book was released on 1978 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Short term Responsive Maintenance Systems written by L. G. Byrd and published by Transportation Research Board. This book was released on 1991 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to maintenance managers, maintenance engineers, and others concerned with the periodic problems associated with the day-to-day maintenance of highways. Information is presented on discovery and response systems applicable to short-term responsive maintenance needs. The development and implementation of short-term responsive maintenance systems (STRMS) can be effective in handling permanent or temporary repairs. This report of the Transportation Research Board describes and discusses the short-term responsive maintenance systems in effect in several states. It describes how these special maintenance needs are detected, reported, evaluated, and managed, and notes how new technology can assist maintenance managers.

Download or read book Quality and Accuracy of Positional Data in Transportation written by Edward Fekpe and published by Transportation Research Board. This book was released on 2003 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The global response to COVID-19 has demonstrated the importance of vigilance and preparedness for infectious diseases, particularly influenza. There is a need for more effective influenza vaccines and modern manufacturing technologies that are adaptable and scalable to meet demand during a pandemic. The rapid development of COVID-19 vaccines has demonstrated what is possible with extensive data sharing, researchers who have the necessary resources and novel technologies to conduct and apply their research, rolling review by regulators, and public-private partnerships. As demonstrated throughout the response to COVID-19, the process of research and development of novel vaccines can be significantly optimized when stakeholders are provided with the resources and technologies needed to support their response. Vaccine Research and Development to Advance Pandemic and Seasonal Influenza Preparedness and Response focuses on how to leverage the knowledge gained from the COVID-19 pandemic to optimize vaccine research and development (R&D) to support the prevention and control of seasonal and pandemic influenza. The committee's findings address four dimensions of vaccine R&D: (1) basic and translational science, (2) clinical science, (3) manufacturing science, and (4) regulatory science.

Download or read book L A W bulletin and good roads official organ of the League of American Wheelmen written by колектив авторов and published by Рипол Классик. This book was released on with total page 771 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book L A W Bulletin and Good Roads written by and published by . This book was released on 1897 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 1116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synthesis of Highway Practice written by National Cooperative Highway Research Program and published by . This book was released on 1992 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings written by United States. National Transportation Safety Board and published by . This book was released on 1992 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Custer National Forest N F Ashland Travel Management written by and published by . This book was released on 2009 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Traffic Models Overview Handbook written by James R. Mekemson and published by . This book was released on 1993 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Automotive User Interfaces written by Gerrit Meixner and published by Springer. This book was released on 2017-02-27 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on automotive user interfaces for in-vehicle usage, looking at car electronics, its software of hidden technologies (e.g., ASP, ESP), comfort functions (e.g., navigation, communication, entertainment) and driver assistance (e.g., distance checking). The increased complexity of automotive user interfaces, driven by the need for using consumer electronic devices in cars as well as autonomous driving, has sparked a plethora of new research within this field of study. Covering a broad spectrum of detailed topics, the authors of this edited volume offer an outstanding overview of the current state of the art; providing deep insights into usability and user experience, interaction techniques and technologies as well as methods, tools and its applications, exploring the increasing importance of Human-Computer-Interaction (HCI) within the automotive industry Automotive User Interfaces is intended as an authoritative and valuable resource for professional practitioners and researchers alike, as well as computer science and engineering students who are interested in automotive interfaces.