Bridge Maintenance, Safety, Management and Life-Cycle Optimization contains the lectures and papers presented at IABMAS 2010, the Fifth International Conference of the International Association for Bridge Maintenance and Safety (IABMAS), held in Philadelphia, Pennsylvania, USA from July 11 through 15, 2010. All major aspects of bridge maintenance, safety, management and life-cycle optimization are addressed including advanced and high performance materials, ageing of bridges, assessment and evaluation, bridge codes, bridge diagnostics, bridge management systems, bridge security, composites, design for durability, deterioration modeling, emerging technologies, fatigue, field testing, financial planning, health monitoring, innovations, inspection, life-cycle performance, load capacity assessment, loads, maintenance strategies, new technical and materials concepts, non-destructive testing, optimization strategies, prediction of future traffic demands, rehabilitation, reliability and risk management, repair, replacement, residual service life, safety and serviceability, service life prediction, strengthening, sustainable materials for bridges, sustainable bridges, whole-life costing, and multi-criteria optimization, among others. Bridge Maintenance, Safety, Management and Life-Cycle Optimization consists of a book of abstracts and a CD-ROM containing the full text of the lectures and papers presented at IABMAS 2010. This set provides both an up-to-date overview of the field of bridge engineering and significant contributions to the process of making more rational decisions in bridge maintenance, safety, security, serviceability, risk-based management, and health monitoring using traditional and emerging technologies for the purpose of enhancing the welfare of society.