Abstract
The solutions of urban vehicle traffic problems imply the description of the system, the
evaluation of its behaviour, the control algorithm design and implementation. For better results,
the traffic control system must be enhanced with an advisor, able to communicate via mobile
phones with the drivers, for providing best route information and acting as a primary traffic
formatter. In the paper a real-time control and information system for urban traffic is presented.
The control part uses a two levels structure connecting controllers and supervisors. The
controllers implement extended state machine. The supervisors implement an algorithm that
negotiates the granted rates of the car flows using their prices. The goal of the research is to
obtain a control system that is able to adapt to the significant changing of the vehicle traffic
characteristics, to increase the system throughput and to avoid or delay congestions. The
information part uses different routing algorithms and provides best route information for the
drivers.
