Abstract: The freeway takes large parts of city’s traffic flow. Good traffic managements and control strategies can ease traffic congestion effectively. This paper uses Visual Basic to develop a simulation program based on macroscopic dynamic network model METANET and ALINEA control model. Then the program is used to simulate a network with two origins and two destinations. The simulation results show that speed of freeway adds about 10 km/h and the capacity of freeway with ALINEA control adds about 150 veh/h. The ALINEA control can relieve traffic congestion effectively.

Key words: freeway, macroscopic traffic model, ALINEA, traffic simulation