Determining the Optimal Use of Urban Underground Space (Selected Streets of Isfahan City)

The use of underground spaces can lead to increased land productivity in cities. This paper addresses the issue of which of the four commercial, warehouse, public parking and passageways (two-floor streets) are optimal if we want to use the spaces below the streets of the city. Therefore, the selected 21 main street of districts 5 and 6 of Isfahan were selected as problem options. Using 2013 data and linear programming method, the objective function was designed for optimal user allocation. In the following, based on the two-stage hierarchical analysis method in the GIS software environment, the optimization problem was investigated. In order to investigate in the first stage, the type of use was selected as the main criteria of the problem including parking, warehouse, business center and passage use, and then, for the second step, the sub-criteria of landing price, traffic flow, area of green space and surface were selected. The results from the first phase survey showed which street is more important for which user. In addition, the results from the second phase survey showed which sub-criteria are more relevant in choosing a type of land use. Based on this, it is possible to decide which street is needed and what the priority of which street is to use for underground space. For the use of parking and passage, Shahid Hemmat Highway has the highest score and HezarJarib Street account for the commercial use and warehouse with the highest score.