Life-Cycle Performance of Deteriorating Structures comprises most of the papers presented at the joint event of the Third IABMAS (International Association for Bridge Maintenance and Safety) Workshop on Life-Cycle Cost Analysis and Design of Civil Infrastructure Systems and the JCSS (Joint Committee on Structural Safety) Workshop on Probabilistic Modeling of Deterioration Processes in Concrete Structures, held in Lausanne, Switzerland, March 24-26, 2003. The 43 papers, including four keynote lectures and the statements and conclusions, cover a wide range of studies on life-cycle performance of deteriorating structures. Contributions are from a range of internationally recognized researchers and practicing engineers from the Americas, Asia, Australia and Europe.