Emergency exits, emergency opening of doors and windows shall be clearly marked/labelled
and shall be operated from the outside (track-side opening). All train doors shall be equipped
with emergency equipment, e.g., by activation of the passenger alarm unit (PAU) an un-
interrupted intercom to the driver in door areas is activated as well as at the location for
wheelchairs. The location for handicapped people shall be designed to cover the needs and
circumstances of wheelchair users.