ABSTRACT
Life cycle analysis (LCA) is an essential step in any long-term planning or decision making for infrastructures, both existing and new. Without an accurate LCA, it is difficult to prioritize projects over a long term, impossible to integrate varying infrastructures with different estimated lifespan, or make an accurate long-term economic projection on a project at the local, regional, or national level. The LCA is perhaps one of the few logical ways to relate different infrastructure sectors; thus, it is important to promote different methodologies and technologies that help in accurate evaluation of LCA. In developing an accurate LCA, discount rates as well as potential uncertainties need to be included.
