Recent developments in structural health monitoring and assessment : opportunities and challenges : bridges buildings and other infrastructures This is a follow up to Health Assessment of Engineered Structures (World Scientific 2013). It incorporates the most recent developments in health assessment and monitoring of infrastructures covering several advanced conceptual frameworks different types of sensors and application potentials. Opportunities and challenges in theoretical numerical and experimental investigations generally overlooked in the profession are discussed. Also included are various types of Bayesian filtering concepts improving the commonly used techniques. Showcasing a multi faceted technology based development in health assessment of infrastructures several new approaches for health assessment are presented to assess the health of masonry structures riveted steel railway bridges and more such as the use of: Modified Social Group Optimization (MSGO) a human based meta heuristic optimization technique autonomous crack detection approach using Artificial Intelligence Augmented Reality (AR) a digital interface that combines interactive holographic components with the real world vision based noncontact and targetless vibration sensors as well as intelligent use of smartphone based health assessment