TRAFFIC SIMULATION METHOD, PROGRAM, AND SYSTEM

摘要

Traffic simulation method, program, and system for automatically determining the value of an appropriate time step of a simulation in a traffic simulation technique. In order to calculate the filling rates of roads, top K intersections are selected from among intersections in a region that is an object of the simulation, for each synchronization timing in terms of the filling rate. For instance, the filling rate is calculated as a filing rate of vehicles on roads directly connected to the intersection. More specifically, the filling rate is calculated by dividing the number of vehicles traveling on each road directly connected to the intersection by the length of the road, and totalizing each quotient. The time step of the simulation is determined as a monotonically decreasing function with respect to the filling rate, preferably, as a value in inverse proportion to the square of the filing rate.

主权项

1. A computer implemented traffic simulation method for sequentially calculating the positions of a plurality of vehicles traveling along roads according to a time interval, wherein the computer includes a processor communicatively coupled to a memory, the method comprising:
calculating a filing rate of an at least one vehicle at an intersection; selecting a plurality of top N intersections with respect to said filing rate; adding up a plurality of filling rates with respect to said plurality of top N intersections to get an added-up filing rate; calculating said time interval of a simulation as a monotonically decreasing function of a value of said added-up filing rate to get a calculated time interval; and advancing said simulation at said calculated time interval.