Author: Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 94
Book Description
Pavement-vehicle Interaction and Traffic Monitoring
Author: Pavement-vehicle Interaction and Traffic Monitoring (R1501).
Author: Pavement-vehicle Interaction and Traffic Monitoring
Author: Handbook of Vehicle-Road Interaction
Author: David CebonPublisher: CRC Press
ISBN: 9789026515545
Category : Technology & Engineering
Languages : en
Pages : 612
Book Description
This handbook dicussess tyre-road contact forces generated by heavy vehicles covering their influence on road surface and bridge response and damage, as well as ways of regulating and improving vehicles so as to minimize road damage.;The main incentive for understanding vehicle-road interaction is the possibility of reducing the road damage caused by heavy vehicles and the very high associated costs. This may be achieved by highway authorities, through improved design and construction of roads; by government agencies, through regulations intended to encourage the use of more "road-friendly" vehicles; or by vehicle engineers, through design of improved vehicle configurations and suspensions, which minimize road damage.;The book provides a unified mechanistic approach to the entire subject, covering vehicle dynamics; dynamic tyre forces; weigh-in-motion; pavement and bridge response; damage mechanisms of paving materials; vehicle-guideway interaction; suspension design to minimize road damage; and assessing road damaging potential of vehicles for regulatory purposes. It includes 25 literature reviews, covering topics from asphalt deformation to weigh-in-motion, and citing over 500 references. In addition, it discusses both the fundamental mechanics of the mechanical and civil engineering systems, as well as practical and implementation issues.
Highway Traffic Monitoring and Data Quality
Author: Michael DalgleishPublisher: Artech House
ISBN: 1580537162
Category : Language Arts & Disciplines
Languages : en
Pages : 263
Book Description
This unique resource gives you a hands-on understanding of the latest sensors, processors, and communication links for everything from vehicle counts to urban congestion measurement. Moreover, you learn statistical techniques for quantifying data accuracy and reducing uncertainty in both current system state assessments and future system state forecasts.
Probe Sampling Strategies for Traffic Monitoring Systems Based on Wireless Location Technology
Author: Michael D. FontainePublisher:
ISBN:
Category : Motor vehicles
Languages : en
Pages : 64
Book Description
Transportation agencies have become very interested in traffic monitoring systems based on wireless location technology (WLT) since they offer the potential of collecting travel time data across a wide portion of the road system. Prior tests of WLT-based systems have been unsuccessful, in part because they have treated the road network as a homogeneous entity. This "area-wide" method has inherent limitations, causing congested roadways to be over sampled and uncongested and low volume roads to be under sampled. This project developed a methodology to estimate sampling parameters based on localized traffic conditions in the network, termed a "zonal approach." In zonal WLT systems, the roadway network is disaggregated into smaller areas, termed "zones," based on cellular coverage areas. In this research, two zonal sampling strategies were examined and tested using three simulated networks. When the road network is complex, the zonal priority sampling strategy was found to distribute probes throughout the network and produced a larger number of speed estimates on uncongested and low volume roads. Moreover, the zonal priority strategy improved speed estimation accuracy by 10 percent over the other two sampling strategies. For networks with simple geometry or uniform congested traffic conditions, there were no significant differences among the sampling strategies. The results of this research indicate that the homogeneous approach used by earlier deployments has limitations, and results could be potentially improved by tailoring sampling parameters to a more localized level.
Predictive Cruise Control for Road Vehicles Using Road and Traffic Information
Author: Péter GáspárPublisher: Springer
ISBN: 3030041166
Category : Technology & Engineering
Languages : en
Pages : 226
Book Description
This book focuses on the design of a multi-criteria automated vehicle longitudinal control system as an enhancement of the adaptive cruise control system. It analyses the effects of various parameters on the average traffic speed and the traction force of the vehicles in mixed traffic from a macroscopic point of view, and also demonstrates why research and development in speed control and predictive cruise control is important. The book also summarises the main steps of the system’s robust control design, from the modelling to its synthesis, and discusses both the theoretical background and the practical computation method of the control invariant sets. The book presents the analysis and verification of the system both in a simulation environment and under real-world conditions. By including the systematic design of the predictive cruise control using road and traffic information, it shows how optimization criteria can lead to multiobjective solutions, and the advanced optimization and control design methods required. The book focuses on a particular method by which the unfavourable effect of the traffic flow consideration can be reduced. It also includes simulation examples in which the speed design is performed, while the analysis is carried out in simulation and visualization environments. This book is a valuable reference for researchers and control engineers working on traffic control, vehicle control and control theory. It is also of interest to students and academics as it provides an overview of the strong interaction between the traffic flow and an individual vehicle cruising from both a microscopic and a macroscopic point of view.
Improving the Effectiveness of Traffic Monitoring Based on Wireless Location Technology
Author: Michael D. FontainePublisher:
ISBN:
Category : Motor vehicles
Languages : en
Pages : 110
Book Description
A fundamental requirement for effectively monitoring and operating transportation facilities is reliable, accurate data on traffic flow. The current state of the practice is to use networks of point detectors to gather information on traffic flow at fixed points on the roadway network. Traffic monitoring based on wireless location technology (WLT) offers an opportunity to expand the size of the transportation network being monitored at a lower cost than with point detection. In WLT-based monitoring, the locations of individual wireless devices are sampled anonymously. By tracking a series of positions for devices in vehicles, it is theoretically possible to estimate the average travel speed on a road. Although the concept of WLT-based monitoring is attractive, results have been mixed. Field tests have been successful at locating vehicle positions but have not been able to generate traffic information of the quality or reliability required for most applications. This research explored how WLT-based monitoring could be improved by rigorously examining the problem from a system design perspective. The evaluation focused on two measures of effectiveness: (1) the availability of speed estimates and (2) the accuracy of speed estimates. The performance of WLT-based monitoring systems was evaluated through a combination of controlled testing on simple networks and case studies on simulated real-world networks. Significant main effects and interactions were evaluated in a systematic manner using a test bed that combined microscopic traffic simulation and a model of a WLT-based monitoring system. The results revealed several important issues to be considered when designing and implementing a WLT-based monitoring system. The selection of parameters such as the number of vehicles tracked and frequency between readings needs to be tailored to handle localized traffic and geometric conditions. The results showed that well-designed monitoring systems could produce accurate results although there were some situations where performance could be improved. Guidelines for the design and use of WLT-based systems were generated, and future avenues to improve system performance were noted.
Pavement Surface Properties and Vehicle Interaction
Author: National Research Council (U.S.). Transportation Research BoardPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Traffic Planning and Engineering
Author: F. D. HobbsPublisher: Elsevier
ISBN: 1483137465
Category : Transportation
Languages : en
Pages : 561
Book Description
Traffic Planning and Engineering, Second Edition takes into account underlying trends in traffic planning and engineering. In this edition, Chapter 3 has been remodeled, focusing on the techniques on conducting surveys and their subsequent analysis. Further emphasis has also been provided on environmental management and the central role of computers in all aspects of traffic planning and engineering. The topics discussed in this book include administration and planning in traffic engineering; traffic studies; traffic surveys and analysis; parking; traffic and environmental management; and road user, the vehicle and the road. The traffic stream and capacity; traffic control systems; street lighting, traffic signs, and carriageway markings; and accidents and road safety are also deliberated in this text. This publication is valuable to traffic engineering students, as well as individuals researching on techniques to achieve the safe and efficient movement of people and goods on roadways.
