����������� Studies on urban networks often focus only on street systems, such as streets as links and junctions as nodes. This paper proposes the evaluation model for "Building-nodes", to examine how they contribute to the whole urban network. By the method of discrete system simulation, which is often used for evaluation of TCP/IP protocol studies, the author introduce the approach to treat urban network as the queueing network where "end-node congestion controls" are possible, to change the

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... ervice time rate or numbers of service of the building. The result of simulation on Ginza shows the potentials of queueing network approach, and the advantage of decentralized intervention on urban network.