Abstract:Road traffic is a problem of time and space, and traffic flow should be correlated in time and space. In order to guide the urban road traffic management, make the urban road traffic flow control and time control area length of high-precision. This paper starts from the relationship between traffic flow parameters, road length, traffic running time, and the definition of time occupancy and space occupancy, defines the cumulative time occupation rate and the cumulative space occupation rate, and obtains the equivalence of traffic flow in time and space. On this basis, the time-space relationship model of road traffic flow is established, which can be used to calculate the length of control time and control area. Through verification of examples, it is concluded that the model can accurately calculate the length of control time and control area, thus avoiding the waste of control and control resources.