The Intelligent Vehicle-Highway System (IVHS) program requires a large number of sensors to accurately measure traffic data. A novel passive acoustic sensing scheme based upon a triple-aperture microphone array is proposed as an inexpensive, reliable alternative to other sensors under consideration. A single sensor exhibits the potential for monitoring several lanes of traffic simultaneously. A...

This investigation was completed as part of the ITS-IDEA Program which is one of three IDEA programs managed by the Transportation Research Board (TRB) to foster innovations in surface transportation. It focuses on products and result for the development and deployment of intelligent transportation systems (ITS), in support of the U.S. Department of Transportation's national ITS program plan. T...

A statistical model is developed for a narrowband mobile-to-mobile channel taking into consideration Rician scattering near receiving and transmitting antennas both individually and concomitantly. From the proposed channel model we obtain the probability density function of the received signal envelope, the time correlation function and RF spectrum of the received signal, and level crossing rat...

This paper focuses on the multi-agent highway traffic simulation. It provides a realistic modeling with high fidelity continuous vehicle movement incorporating physical dynamics of the vehicles. The deliberative agent part of the system enables to implement and evaluate complex cooperation and coordination algorithms. The paper presents the architecture and implemented simulator for evaluation ...

Imagine that you are driving on the highway at 70 mph and trying to figure out which lane should follow to exit in front. The precision of the current GPS cannot tell on which lane you are on, so the instruction given by the GPS is just as simple as ”keep right” resulting in the driver’s panic caused by searching from multiple signs. However, if we have a smart camera mounted inside the vehicle...

Automatic symbolic tra c scene analysis is essential to many areas of IVHS (Intelligent Vehicle Highway Systems). Tra c scene information can be used to optimize tra c ow during busy periods, identify stalled vehicles and accidents, and aid the decision-making of an autonomous vehicle controller. Improvements in technologies for machine vision-based surveillance and high-level symbolic reasonin...

SmartAHS is a software framework for the uniform speciication, simulation, and objective evaluation of Intelligent Vehicle Highway System (IVHS) alternatives. This paper illustrates the use of the object-oriented paradigm in its design, implementation and use. Objective comparison of proposed highway automation alternatives is achieved, when all control architectures are speciied in SmartAHS. T...

This paper describes two multi-agent systems developed at Southwest Research Institute to address issues in automated planning. The Autonomous Underwater Vehicle (AUV) Planning system uses multiple cooperative agents to generate a path for the AUV. The Medical Test Planning System (MTPS) consists multiple agents that incrementally build a schedule for a series of medical tests constrained by th...

Microscopic simulation modelling has recently become attractive to researchers in traffic engineering as it appears to offer a cost effective and ‘safe’ way of investigating Intelligent Vehicle-Highway System (IVHS) at a fundamental level. However, the deterministic approach used assumes a consistency of behaviour which may severely detract from model validity. This may be overcome by using a ‘...