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European Definitions

Directive 2004/49/EC

(For the Railway (Transport) Sector) An unwanted or unintended sudden event or a specific chain of such events which have harmful consequences; accidents are divided into the following categories: collisions, derailments, level-crossing accidents, accidents to persons caused by rolling stock in motion, fires and other. [1]


(For the Railway (Transport) Sector) An unintended event or series of events that results in death, injury, loss of a system or service, or environmental damage [2].

Other International Definitions

An unintended event or series of events that results in harm. [3]

National Definitions


A sudden event in which harm is caused to people, property or the built or natural environment. [4]


"Accident" shall denote a large-scale incident, affecting roads, highways and air traffic,

destruction of hydro-technical installations, incidents, caused by activities at sea, nuclear

incidents and other environmental and industrial accidents, caused by human activity or acts. [5]

Авария: е инцидент от голям мащаб, включващ пътища, магистрали и въздушен трафик, пожар, разрушаване на хидротехнически съоръжения, инциденти, причинени от дейности в морето, ядрени инциденти и други екологични и промишлени аварии, причинени от дейности или действия на човека. [6]


An unintended, unplanned and unexpected event that interrupts an activity and sometimes causes injury or damage.
Événement involontaire, non planifié et imprévu qui interrompt une activité et qui entraîne parfois des blessures ou des dommages. [7]

See also


  1. Directive 2004/49/EC Railway Safety Directive amending 2001/14/EC & 95/18/EC
  2. EN 50129 - Railway applications-Communications, signalling and processing systems- Safety related electronic systems for signalling
  3. Engineering Safety Management, issue 4, “Yellow Book 4”, ISBN 978-0-9551435-2-6
  4. Australian Emergency Management Glossary, Emergency Management Australia (1998)
  5. Disaster Protection Act; Promulgated, State Gazette, No.102/19.12.2006 (2006)
  6. ЗАКОН за защита при бедствия
  7. Vocabulaire de la gestion des urgencies/Emergency Management Emergency Management Vocabulary 281 (2012)