Optimization of transport network management emergency Tehran metropolis of natural hazards with approach future studies

Disasters are large intractable problems that test the ability of communities and nations to effectively protect their populations and infrastructure, to reduce both human and property loss, and to rapidly recover. The limited availability of reconstruction rsources is one of the main challenges that often confront post disaster recovery of damaged transportation networks. This requires an effective and efficient deployment and utilization of these limited resources in order to minimize both the performance loss of the damaged transportation network and the reconstruction costs. This paper presents the development of a robust model for planning post disaster reconstruction efforts that is capable of: (1) optimizing the allocation of limited reconstruction resources to competing recovery projects; (2) assessing and quantifying the overall functional loss of damaged transportation networks during the recovery efforts; (3) evaluating the impact of limited availability of resources on the reconstruction costs; and (4) minimizing the performance loss of transportation networks and reconstruction costs. The model utilizes the user equilibrium algorithm to enable the assessment of the transportation network performance losses and a multi objective genetic algorithm to enable the generation of optimal tradeoffs between the two recovery planning objectives. The main goal of the initial search-and-rescue period after strong earthquakes is to minimize the total number of fatalities. One important difficulty arising in this period is to find the best assignment of available resources to operational areas. For this problem a dynamic optimization model is introduced. The model uses detailed descriptions of the operational areas and of the available resources to calculate the resource performance and efficiency for different tasks related to the response. An adequate solution method for the model is presented as well.The city of Tehran, is located in a seismic prone area in an active part of Alpine-Himalayan Orogenic belt (Alborz Mountain Range) and has surrounded by several active faults. More over this city has experienced some destructive earthquakes in its history. Tehran is a city with about ten million people living or commuting in and out of it on a daily basis. The history of the region indicates strong earthquakes of magnitude 7.0 and higher, with a return period of 175 years. With the constant threat of strong earthquakes, the city of Tehran and the scientific body have joined together to prepare and implement a comprehensive plan for different aspects of the earthquake reduction policies. Focuses only on the disaster mitigation strategies for the city of Tehran. In the common transportation and traffic literature, optimization of transport management structure under emergency conditions which is naturally a kind of designing non-continuous traffic management network in terms of systematic management has not been paid enough attention. Thus, the main goal of this article with the purpose of pre-accident future prediction is to improve performance and reduce time of conceptual optimization of emergency transport management structure so that we can offer initial facilities and necessary rescues to cover all requests in the related districts in different levels, and select routes with possibility of blocked routes in natural accidents by sufficient facilities as soon as possible. The main goal of formulation and implementation of the disaster management master plan for Tehran is to secure the lives and properties of the citizens against a potential devastating earthquake. This is an applied, descriptive- analytical research and the data is collected in documentary (library) method. The necessary information and statistics were gathered from famous centers such as Tehran general traffic studies center and Tehran crisis management. This research tries to suggest a model for optimization of structure of emergency transport management of trips of the total network after earthquake in a district on study by passing the following steps: First phase, In this phase, using existing maps of Tehran fault seismicity history of futures studies approach to the assessment of natural hazards is presented in 22 districts of Tehran. Second stage, the first stage is to identify highways within the mind. Third stage, In this stage, the risk analysis of transportation networks, transport networks vulnerable to earthquakes is investigated in Tehran. Fourth stage, In this stage, the means of emergency transportation by selecting a subset of a given set of curves of the highway network in such a way that the objective function is optimized within the limits of travel time. Step Five, Finally, a conceptual model of emergency transportation management system for optimization of Tehran is presented. Transportation has strategic and critical importance for relief of earthquake injuries. Therefore, the first thing to be immediately prepared and amended is the access routes of rescued persons. Logic prediction of traffic demand after earthquake is principal foundation of possible transportation performed before programming and traffic control, which is a kind of guarantee for a successful rescue and saving. The principle of emergency response is the recognition and evaluation of potential risk, type of accidents, and possibility of occurrence and effect of accident intensity. In emergent urban plans, in, a definite headquarter framework and integrated operational chart shall be available after earthquake especially in metropolitans for local emergency transport programs and management centers.Due to high congestion and high mobility of population, buildings and cars, settlement of types of urban usages and public places, Metropolitan Tehran has a considerable intra city trips, and the limitations and problems arisen from deficiencies and lack of a dynamic and stable, and however, effective transport navigation shows an unavoidable necessity of an advanced network in urban transport navigation. It shall be moreover noted that emergency transport management is not bound to framework of routing methods and reducing rescue time but the savior’s ideas and maneuver in emergency develops this fact that the settlement of emergency transport management and optimization of concepts of management of efficiency improvement will be considered as the main elements of transportation in order to provide a flowing traffic movement in highways and streets in emergency in shortest time through reducing and omitting serious damages of earthquake.