prEN 45545 specifies: measures on railway vehicles for fire protection; verification of these measures. prEN 45545 specifies prevention measures. The measures and requirements specified in prEN 45545 are intended to protect passengers and staff in railway vehicles in the event of a fire on board. This protection of passenger and staff is essentially based on the ability of the rolling stock to allow for evacuation in safety, satisfying conditions (according to the objectives in Clause 4) in the frame of a guided transportation system which includes in particular vehicles, infrastructure and operation rules. The present European standard describes the measures to be taken in the design of the vehicles in the context of the infrastructure within which they operate. It is not within the scope of prEN 45545 to describe measures that ensure the preservation of the vehicles in the event of a fire. This European standard is valid for railway vehicles as defined in 3.1. Freight transportation vehicles are not covered by prEN 45545. This part of prEN 45545 covers: principal definitions; operation categories; design categories; fire safety objectives; general requirements for fire protection measures and their evaluation of conformity.