This European Standard gives the requirements to be met for the design@ dimensions@ performance and testing of single/double brake indicators with or without electrical contacts. It applies to electrically operated brake indicators visible from the outside of the vehicle. NOTE Brake Indicators give precise and accurate information about release and application of the brake. This European Standard applies to brake indicators on railway vehicles used on the main national networks@ urban networks@ underground railways@ trams@ private networks (regional railways@ company railways@ etc.).