Selected issues of the control intelligent road transport systems. Coordinated traffic lights systems

Newest traffic lights coordination system’s structure contains such components as: local control, global/area control and directional transmissions of data. Today’s wireless controllers, in addition to the standard measurement and signaling functions (handling induction loop circuits, handling double-state signals, handling predefined signal groups), also perform advanced communication functions. With the implementation of such communication technologies/protocols as Ethernet TCP/IP, GSM, GPRS , these controllers are able to send text messages as well as support remote monitoring and control. The beginning of this paper presents shortly chosen examples of current solutions of Zonal Traffic Control Systems. Next a microprocessor model (8051) for controlling traffic lights in an intersection (normal, two-lane) is analysed. Finally the paper emphasises the role of wireless data transmission systems in smart communication in cloud computing and database technology solutions