A TWO-DIMENSIONAL CA TRAFFIC MODEL WITH DYNAMIC ROUTE CHOICES BETWEEN RESIDENCE AND WORKPLACE

摘要

The Biham, Middleton and Levine (BML) model is extended to describe dynamic route choices between the residence and work place in cities. The traffic dynamic in the city with a single work place is studied from the velocity diagram, arrival time probability distribution, destination arrival rate and convergence time. The city with double work places is also investigated to compare with a single work place within the framework of four modes of urban growth. The transitional region is found in the velocity diagrams where the system undergoes a continuous transition from a moving phase to a completely jamming phase. We perform a finite-size scaling analysis of the critical density from a statistical point of view and the order parameter of this jamming transition is estimated. It is also found that statistical properties of urban traffic are greatly influenced by the urban area, work place area and urban layout.