A Study on Street Network Planning against Street Blockades in a Densely Residential Area

Abstract

A street network is often closed caused by the occurrence of an earthquake, so that emergency traffic, such as rescues and ambulances, cannot get to their destination. An estimation method of the damage by street blockades in a densely residential area has been developed in this study. The data of the factors of a street blockades, such as building age, building height, fence height, street width and so forth, were collected by a field survey. Using the data, locations of street blockades and the number of inaccessible buildings are calculated.By changing the input conditions that intend to indicate the level of street blockade, we can investigate the change of the network structure that will be partially disconnected and the increase of inaccessible buildings. Also the effects of repairs or reinforcements of buildings and streets are estimated.