This European Standard specifies the functional requirements for cab windscreens of high speed trains including testing and conformity assessment. The same requirements can be applied to the windscreens of other types of rolling stock if some of the performance criteria are adjusted to suit the application. Such changes should be based on national standards or infrastructure controller's regulations where they exist. This European Standard does not specify all interfaces between the windscreen and the vehicle. This European Standard does not apply to the renewal of windscreens of high speed rolling stock already in operation.