The durability of transport infrastructure influences the traffic safety. Structures designed without respect to long-term performance deteriorate much faster and become dangerous for users. The project aims to remove selected problematic aspects of design of transport infrastructure. One of the solved areas is represented by the transition zones of bridges. The performance of road bridges is mainly influenced by the lacking durability expansion joints and bearings. These aspects can be removed by the design of integral bridges which are known for their bigger endurance and durability. Another solved area is the track-bridge interaction of railway bridges with the long-welded rail. The long-welded rail can remove problems with durability and maintenance of rail expansion joints and improve the safety of railways. The project is based on experimental measurements of the existing and newly built bridges. The experiments will be evaluated numerically- the results will lead into optimization of current design and construction procedures.