Showing papers on "Intelligent transportation system published in 1989"

A conceptual model for vehicle navigation systems

Abstract: The author shows how his conceptual model relates to the cognitive processes that go on during vehicle navigation and driving. Conceptually, the system may include human minds as well as various vehicle navigation aids. It must be able to perform five fundamental functions: geographic database, location of vehicle and destination, route planning, instruction generation, and vehicle control. It also must provide links or communication methods whereby information and commands may flow among these components. These functions may be grouped and assigned to various people and devices involved in the system. Adoption of this model allows researchers to focus more clearly on particular components of the system and on the associated research questions. >

Magnavox Automatic Vehicle Location Pilot System for the Toronto Department of Ambulance Services

Abstract: The AVLS integrates several technologies in a manner that permits satisfaction of demanding requirements, and allows for significant growth and application customizing. Principal examples of this integration are the navigation subsystem, communication subsystem, and AVLS base station dispatch software. Each of these subsystems is described, and how they address the specific needs of the application is illustrated. The ability to tailor the system to other AVLS requirements is also discussed. >

Road information systems; impact of geographic information systems technology to automatic vehicle navigation and guidance

Abstract: A prototype road information system being developed at the University is a special-purpose geographic information system that collects, organizes, and disseminates information related to the street and highway networks of a city or region The basic structure is the road and street network made up of a series of nodes and links, by which attributes from different applications can be referenced The structure, if properly designed, can serve many applications such as route determination and guidance, commercial and service information provision, dispatching and monitoring of fleet vehicles, and road inventory and traffic management The current research effort of the prototype concentrates on data modeling, spatial database management, communications, and real-time applications for the many automatic vehicle location, navigation, and guidance systems presently being developed >

Communications flow considerations in vehicle navigation and information systems

Abstract: The advent of numerous intelligent vehicle/highway system projects has brought to the forefront issues that must be decided before an integrated approach can proceed. The author discusses possible methods of transferring information to and from the vehicle navigation system, outlining some of the advantages and disadvantages of each method, and presents some of the types of information that may be communicated in future vehicle navigation and traffic control systems. He concludes, from knowledge of the minimum desired functionality of a vehicle navigation system, that the need for some type of two-way infrastructure to facilitate data transfer is apparent. He points out that a thorough investigation of the alternative uses for the vehicle navigation system and its communications network must be conducted, and expansion must be taken into account in all standards for vehicle navigation systems and their infrastructures. >

Vehicle/highway automation: policy issues and strategies in california

Abstract: One of the main options still open to solve the urban congestion problem is the incremental introduction of Intelligent Vehicle/Highway System Technology. This technology could provide longitudinal and lateral control of vehicles for much higher capacity and improved safety. This major change in the transportation system requires understanding of the major policy questions, and the elimination of the institutional, human factors, internal, and external barriers to development and deployment of this vehicle/highway technology. These efforts must proceed on a parallel track with the development of the technology if success is to be achieved.

Program on advanced technology for the highway (path)

Abstract: This paper describes a program of research, development and demonstration of advanced technologies for the automobile/highway system created in California, under the general direction of the California Department of Transportation (Caltrans). The Program on Advanced Technology for the Highway or PATH will center on relief of traffic congestion, air pollution, parking and cleaner energy for transportation. Current funding commitments from the U.S. Department of Transportation (FHWA and UMTA) and Caltrans total approximately $8 million. This provides the initial component of funding in a $44 million R&D effort, the goal being to advance highway electrification, automation and navigation technologies to a level of technological maturity.

The removal of parking search traffic from the town centre

Abstract: A discussion is presented on the use of car navigation and information systems to move cars between parking places so that the amount of time which car users have for their activities is maximized It is noted that this will result when systems deliver shortest in-car travel time to best-choice parking locations Three parking systems concepts, the advance booking technique, the holding place technique, and the parking access time offer technique are described These techniques will enable towns to reduce, or even to eliminate, parking search traffic >

Thrusts of the Michigan program in intelligent vehicle-highway systems

Abstract: This program has been characterized by an incremental approach to IVHS technology deployment, an extrapolation from the interests and capabilities of the automotive industry, and complementarity to other university programs in North America. Its research thrusts are in the areas of advanced driver information systems, and freight and fleet control. The University's proximity to Canada has also resulted in Canadian sponsorship and potential IVHS demonstrations involving both countries. >

Public data networks: the Mobitex system

Abstract: Summary form only The author presents an overview of the hierarchy, features, and functionality of the Mobitex public data network, soon to be in operation throughout Canada and the United States He discusses some of the problems and inefficiency factors faced by existing networks in attempting to address an ever-growing market need for mobile data communications He addresses how, through the introduction of a network such as Mobitex, some of these problems (ie frequency allocation and geographical expansion) can be avoided Access to a North-American-wide mobile data market and the effect on specific industries, such as transportation, vehicle navigation, and fleet management are discussed The crucial role of the system integrator (value added reseller) and the distribution philosophy for the Canadian market are outlined >

User applications of mobile satellite services

Abstract: The author outlines the Canadian Mobile Satellite program and the associated service offerings, and provides some detailed examples of potential end-user applications related to vehicle navigation and information systems. Particular attention is given to such end-user applications as aircraft flight tracking, truck fleet management, marine fleet management, and railcar fleet management. An outline of the expected end-user benefits of these services is given. >

Developing a Research Program in Intelligent Vehicle-Highway Systems

Abstract: Intelligent Vehicle-Highway Systems (IVHS) improve the operation of cars and trucks on public roads by combining information technology with road transportation technologies. The basic idea about IVHS are by no means new but a number of converging forces have encouraged significant IVHS development in North America recently. Based on results of a Delphi survey to project realistic future scenarios, both applied and fundamental research agenda are being formulated in a Michigan-based IVHS program to push the IVHStechnologies for advanced motorist information systems and for backup vehicle controls under emergency conditions. The scope of the research agenda includes social/human elements as well as hardware and software technological systems. The Mighigan research program is expected to contribute to the development of IVHS in North America, both technically and institutionally.

Active safety research on intelligent driver support systems

Abstract: The rapid development of new information technology makes it realistic to look for more advanced driver support systems to increase the active safety of modern vehicles. Application oriented R&D work must be stimulated in the areas of advanced micro-electronics, new communication techniques, AI-type software, and automotive human engineering. The design of a driver-vehicle interface where the information flow to the driver and the control actions taken by the driver could be supported in an intelligent and selective way is the long-term goal. Research on optimal design of the driver-vehicle interface, where also the adaptive dimension of the driver-vehicle dialogue (or interactions) can be addressed, will therefore be of specific interest. Some examples of active safety research and development work within the SAAB-SCANIA Group in the past, at present and in the future are discussed.

A precision automatic vehicle location system for use in construction automation

Abstract: A prototype automatic position and control system is being developed for use in position-sensitive construction processes. The system, operating in the 400-450 MHz UHF band, provides three-dimensional location information within the construction site. The three-dimensional data from the system are available in near real time as input to a CAD database of the construction project. The vehicle to be located is equipped with a spread spectrum beacon transmitter and its position is found using a hyperbolic phase ranging system. Several methods of improving the accuracy of the system in the presence of multipath interference have been investigated. A computer simulator has been developed using Monte Carlo analysis to predict system error performance and thus evaluate the effectiveness of various multipath defeating techniques. Antenna diversity and receiver diversity have been found to improve dramatically the overall accuracy. Weighting techniques are used to reject data contaminated with large multipath errors. >

Smart highways, smart cars...: tomorrow's cars will be motored by brainpower, and the highways they travel on will be smart enough to communicate with them

Abstract: This article briefly describes various IVHS technologies being performed or promoted by the Michigan Dept. of Transportation and by UMTRI ( University of Michigan Transportation Research Institute).

Vehicle/highway automation. technology and policy issues. vehicle/highway automation: policy issues and strategies in california. sae future transportation technology conference, august 7-10, 1989, vancouver, canada

Abstract: One of the main options still open to solve the urban congestion problem is the incremental introduction of Intelligent Vehicle/Highway System Technology. This technology could provide longitudinal and lateral control of vehicles for much higher capacity and improved safety. This major change in the transportation system requires understanding of the major policy questions, and the elimination of the institutional, human factors, internal and external barriers to development and deployment of this vehicle/highway technology. These efforts must proceed on a parallel track with the development of the technology if success is to be achieved.

Optimal diversion strategies for modified urban network. final project report

Abstract: Research was undertake, with the aim to contributing to both shot-term and long-term measures to combat congestion in urban areas. The product of this research will provide planners with a planning tool for short-term diversions to avoid traffic bottlenecks. With respect to long-term measures, this research effort parallels the goal of one of the intelligent vehicle highway systems element referred to as advanced traffic management systems. Though future proposals for the integrated IVHS are impressive, its long term nature, capital intensiveness and cost effectiveness make the short-term measures still attractive. The product of the research is ts believed to find useful applications in both short and long-term advanced traffic control s ystems. Knowing traveler destinations is essential in meeting the user need in establishing diversion strategies. With this intent, a destination estimation model based on linear programming approach is developedin this research.

The marketability of advanced transit technology

Abstract: The variety of automated people mover (APM) system technologies which already exist or are feasible define a broad spectrum of intelligent transportation modes. APMs are suited for many different applications and appear to be growing in importance as a solution to a variety of access needs. Major activity centers, airports, theme parks, planned developments and downtowns are, in increasing numbers, examining APMs.

Opportunities And Constraints For Advanced Highway Technologies: A Speculative Analysis

Abstract: Program on Advanced Technology for the Highway INSTITUTE OF TRANSPORTATION STUDIES UNIVERSITY OF CALIFORNIA AT BERKELEY Opportunities and Constraints for Advanced Highway Technologies: A Speculative Analysis Elizabeth A Deakin UCB-ITS-PRR-89-7 The contents of this report reflect the views of the authors who are responsible for the facts and accuracy of the data presented The contents do not necessarily reflect the official views or policies of the State of California or the Federal Highway Adminis- tration This repot-l does not constitute a standard, specification, or regulation October 1989