Lifeline Road Planning Method in Disaster-Prone Areas

Road system is one of important part of lifeline systems in disaster-prone areas. It is very significant to do the lifeline road planning in disaster-prone area to mitigate disaster loss and save lives. The paper borrowed ideas from developed countries about lifeline road’s definition, planning methods, and planning experiences. After that, the definition of lifeline road in our country has been set. And several affect factors of lifeline road planning were found, they are: natural characteristics, type of disasters, spatial distributions, transportation system, and other lifeline system distributions. The planning object was set up to build a definite function, wide coverage, flexible and reliable, and smooth lifeline road system. According to the object, basic principles were suggested and the planning method was provided. By integrating node layout and dynamic programming with the guidance of planning objects, there are two paths to planning the lifeline road based on evaluating existing road network, the first one is to select critical links of road network, and the second one is to improve the road network structure.