ABSTRACT
Urban lifeline facilities are mainly a group of facilities that have been created by using public utility funds. Structurally, they have the following shared characteristics:
1. They are a collection of linear facilities developed over a wide area. 2. They are essentially separate networks constructed for each service. 3. They are a group of facilities that are constructed over many years and provide services using a
combination of new and old facilities. 4. They are services provided as a network, and damage at one location will affect other locations. 5. Generally, they are buried under roads.
