Railway health monitoring enables early detection and warning on tracks requiring service and repair before critical faults occur. The WSN collects information on structural health and behaviour of railway infrastructure, and transmits it to the data server enabling remote monitoring. VTT has also developed a completely wireless system for train wagon collision testing. The system is currently designed according the European Wagon TSI directive. The main parameters to measure during the collision tests are buffer force, acceleration and deformation on the wagon structure.