In order to solve the problem of traffic congestion around the school during the peak period of primary and middle school students, the impact range of different degrees of congestion around the campus is divided. Firstly, according to the positional relationship between the student's home address and the campus, the maximum impact area of the traffic around the campus is determined; according to the comprehensive evaluation standard, the traffic data around a campus in Lanzhou Anning District is taken as an example to divide its traffic condition into several grades;Secondly, Through the calculation of the traffic capacity of the surrounding intersections during the vacation and the beginning of the semester, the initial traffic capacity of the intersections and the traffic capacity of the intersections in the congestion state were determined. Finally, the relative residual capacity method is used to calculate the result. Intersections of the same level are classified into one category. The traffic impact range is determined by connecting the intersections of the same level. Keywords: area of effect; intersection capacity; primary and secondary school campus

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