Problems of Optimization of Control for Crossroads with Multi-Stage Passage of Traffic Flows

The topic of the paper is the control problem at urban road intersections which characteristic feature is their separation into sections with local regulation by traffic lights; some passage directions for such intersections demand stops at internal stop lines. Methods for solution of constituent problems of structural and parametric optimization are presented; they are based on choice of traffic passage schemes at each section as well as the sequence and duration of traffic lights phases and aimed to the necessary safe traffic intensity achievement in all admitted directions.