Abstract
In recent years, various urban problems have appeared due to the development of motorization, and as a measure against them the idea of compact city is discussed in various cities : from small city to large city. Thus in this study, focusing on the urban population size, we analyze the effect of the measures for compact city by numeral simulation in the hypothetical cities which have various urban population sizes. We clarify the influence of the difference of the urban population size on the effect of these measures.