A New Cellular Automaton Model for Urban Two-Way Road Networks

Figure 4

Update rules of the vehicles in intersection areas (e.g., take the vehicles from Lane 1). (a), (b), (c), and (d) show the four scenarios by which the vehicle is allowed to enter the intersection. (e), (f), (g), and (h) show the four occasions on which the vehicle is forbidden to enter the intersection. (i) shows the “gridlock” phenomenon. The number on the vehicle represents which lane it comes from. represents that the cell is empty. represents that the cell is occupied by a vehicle.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)