A regular inspection and the metrological documentation of the track system’s condition as well as the contact line is the basis of economical maintenance measures. The current state is recorded with the help of the most modern measuring technology, from punctual measurements to continuous digital registration of the whole rail network. These data are the basis for an optimal planning of the necessary maintenance work. The great variety and high flexibility of ZWEIWEG vehicles are perfect for carrying out all necessary inspections and measurements on the track infrastructure.