Studies of dynamic wheel-rail interactions are most often analyzed for straight or curved track, and less frequently for a railway vehicle passing through a turnout. Turnouts represent a discontinuous area of track stiffness. In railway infrastructure, the turnout, along with its control and monitoring system, is one of the key elements that must ensure the highest level of safety. A significant number of railway incidents and train derailments occur at turnouts. Properly assessing the benefits of design solutions that impact geometric stiffness (comparing different types of structures) can be crucial for both accessibility and safety. The described studies attempted to evaluate different types of structures by defining appropriate measurements in the area of a railway turnout – in particular, the assessment of the stiffness of switch blades during train passage. For consistent, high availability, it is also crucial to be able to determine the current condition of the turnout. This study asks whether currently operating high-speed turnouts of identical radius and type meet the same requirements for geometric stiffness of moving components? The second question concerns the vehicle diagnostic capabilities within the scope of the applied test methods.