ITS Berkeley

This article investigates the vulnerabilities of Supervisory Control and Data Acquisition (SCADA) systems which monitor and control the modern day irrigation canal systems. This type of monitoring and control infrastructure is also common for many other water distribution systems. We present a linearized shallow water partial differential equation (PDE) system that can model water flow in a network of canal pools which are equipped with lateral offtakes for water withdrawal and are connected by automated gates. The knowledge of the system dynamics enables us to develop a deception attack...

Cell-phones equipped with a global positioning system (GPS) provide new opportunities for location-based services and traffic estimation. When traveling on-board vehicles, these phones can be used to accurately provide position and velocity of the vehicle as probe traffic sensors. This article presents a new technique to incorporate mobile probe measurements into highway traffic flow models, and compares it to a Kalman filtering approach. These two techniques are both used to reconstruct traffic density. The first technique modifies the Lighthill–Whitham–Richards partial differential...

We consider the problem of stabilization of the inviscid Burgers partial differential equation (PDE) using boundary actuation. We propose a solution to the problem using a Lyapunov approach and prove that the inviscid Burgers equation is stabilizable around a constant uniform state under an appropriate boundary control. We conduct this study in the space of weak solutions of the PDE. Because of the absence of viscosity term, discontinuities can appear in finite time for general initial conditions. In order to handle this feature of the solutions, we decompose the Lyapunov function into a...

The need for accurate real time traffic information is growing in almost all big cities around the world. One of these cities is Stockholm, recently named as the fifth most congested city in Western Europe. The Mobile Millennium Stockholm project was initiated by the Swedish Transport Administration in order to address the need for a useful and timely traffic information system. The purpose of the project is to assimilate the knowledge gained from the Mobile Millennium project at University of California, Berkeley and develop new methods for data fusion, one of the most challenging...