The project focuses on the development of a methodology for detecting bridge structure damage using optical fibers with distributed sensing, with a focus on fatigue crack detection. The goal is to develop and test, under laboratory and real conditions, the bonding of the fiber with the base material and protection against climatic conditions and external influences. As part of the project, a data collection and processing system on the cloud will be developed. FBG sensors, strain gauges, and DIC will be used as reference. The results will be compared with numerical models. The developed technologies and results obtained within the project will be verified on a pilot application on a steel or concrete bridge, which will be selected in cooperation with the RSD, SZ or TSK.