Accidents and incidents to be investigated:
- train collision (with another train, a shunting unit or an object or obstacle within the clearance gauge) or derailment, resulting in the death of at least one person or serious injuries to five or more persons, or extensive damage to the rolling stock, the infrastructure or the environment (in excess of EUR 2 million)
- any other railway accident with similar consequences, which has an obvious impact on railway safety (safety regulation or safety management)
- level crossing accident, resulting train derailment, or resulting in the death of at least one or serious injuries to five or more members of the train crew or passengers, or if the accident was result of failures within the railway system, or which due to deaths or injuries, the extent of damage incurred to the environment, property or assets, or nature of the accident can be regarded as particularly serious
- accident to persons caused by rolling stock in motion at a station or railway yard (personnel, passengers), or in connection with a track maintenance operation (personnel)
- fire in rolling stock when running between the departure station and the destination (including when stopped at the departure station, the interim and destination stops), and re-marshalling operations.
- other type of accident
- metro accident
- tramway accident.
The purpose of the safety investigation is to improve safety and prevent future accidents.
Railway accident investigation is based on the Safety Investigation Act (525/2011). All investigations adhere to the provisions of the European Parliament and of the Council laid down in Chapter 5 of the Railway Safety Directive (2004/49/EC).
Upon completion, investigation reports are published on the website of the SIA.