Abstract
The city model that consists of a city center and built areas around it is assumed. In addition, let a unit that constitutes the built area be a built-area agent. The built-area agent moves to a place that has the convenient traffic to a city center, and the proper density of the block to which it belongs. Generally, traffic convenience and validity of city density are contradictory. It is because that the built-area agents concentrate on the urban central part convenient regarding traffic, so urban density becomes very high and becomes less proper owing to it. Then, a degree-of-satisfaction function is set up. And the independent variables of it are traffic convenience and validity of city density. When the built-area agent acts in order to improve the degree of satisfaction under the above conditions, the simulation of the urban form that they constitute is carried out.
