ABSTRACT
Traffic control systems are traditionally grouped into three main categories: fixed-time, flow-actuated and vehicle-actuated systems. This chapter discusses four basic forms of traffic light control may be distinguished: pretimed, flow-actuated, vehicle semi-actuated and vehicle fully actuated. The last type may be further subdivided into fully actuated with flow density control and without flow-density control. A comparison, in terms of delay, between fixed time and rule-based strategies is also shown. Average delays on the whole junction, in all the simulations performed, indicate that the new system is able to produce very good performances of the junction traffic control. At times the improvement compared with that of the fixed-time system is poor enough, especially in the presence of high congestion levels. The results obtained both by applying the neural production rule-based system, for implementing traffic light control, and the neural weightless approach, as congestion detector, seem to be very encouraging.
