NTEGRATION OF NATIONAL - PROVINCIAL ROAD NETWORK IN ORDER TO ROAD NETWORK ROBUSTNESS IN EARTHQUAKE-TSUNAMI PRONE AREAS CASE STUDY: ACEH PROVINCE

• Main Author: Rizal, Muhammad
• Format: Dissertations
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/54261
• Institution: Institut Teknologi Bandung

The earthquake-tsunami in Aceh Province in 2004 destroyed a large part of the road network along the west coast route and left some areas isolated. Sparse connectivity and development of road networks without disaster mitigation basis have the potential for similar conditions to recur if a similar disaster recurs or other disasters that cause the same damage. The easiest access to the disaster location is by road. On the other hand, the unreliable road network made the distribution of relief to the affected areas experiencing obstacles. The aims and objectives of this research are to build a practical robustness model as a tool in developing a road network based on disaster mitigation. The integration of both provincial and national road network is a logical choice, given that both road networks serve inter urban connectivity. In addition, it is effective in managing because it only involves one government (provincial or central). Some robustness models consider the Topological Index (TI) in calculating the robustness of the road network but have not been able to provide road network reliability to important facilities, such as logistic center. In addition, empirical problems in the real-world such as budget constraints of local government to provide road development are not considered. The concept of robustness analysis used in this study is packaged in the form of a bi-level tiered Network Design Problem (NDP), which considers theoretical and empirical problems. Two main variables are assigned to the upper level and lower level, respectively, TI and travel time, as objective function of the max-min. TI was chosen because it was easy and practical to apply, while the travel time was chosen to support TI that was unable to provide road network reliability. At the upper level, there are obstacles in the form of limited road construction budgets. The resulting NDP robustness model is assembled using a computer language running on the Matlab R2018a software. The model is tested against the current road network towards the disaster impact scenario of the 2004 earthquake-tsunami in Aceh Province. In this scenario, the model is assigned to identify additional road sections that increase the robustness of the post-disaster road network and search for a logistics center with sufficient food availability with the minimum travel time and provide information on road construction costs. Considering this scenario, theiv issue of food availability is accommodated in this model. The test results show that the model is able to identify roads that provide optimal robustness and the minimum travel time (shortest path method). Further calculation and model development are required due to data limitations and other important factors that have not been considered