The purpose of the Accident Causation is to use the DREAM methodology to analyse and code the cause of each accident in a uniform and comparable way.


All Teams

  • When all relevant pre-crash information is collected the DREAM method is used for categorising contributing factors.
  • Reconstructions can validate the result.
  • One DREAM analysis is completed for each road user such as driver, powered two wheeler rider (driver), pedal-cyclist and/or pedestrian (not passengers) regardless of blame.
  • Enter the DREAM codes in the database system.


The Driving Reliability and Error Analysis Method (DREAM) was first developed by Ljung and later developed in the EC SafetyNet project to make it possible to systematically classify and store accident causation information which has been gathered through in-depth investigations by providing a structured way of sorting the causes behind the accident into a set of formally defined categories of contributing factors. The methodology has since been further developed, including updates for use in the DaCoTA project.

For further information on DREAM, please click here.

For a pdf version of DREAM, please click here.


Please refer to the Accident Causation section of the Equipment List for the Accident Causation equipment list.


All Teams

Training and support from the DaCoTA partnership.