WP3 of the European Project TRACE is concerned with Types of Factors to analyse the causation of
road traffic accidents from a factors' point of view. In task 3.3 'Trip-related Factors' it was tried to
characterise accidents that are caused by certain contributing factors found on a trip level.
This was done by applying one statistical method to existing databases of the WP3 Partners on the one
hand and on the other hand by performing an in-depth case analysis using the WP5 method.
The analysed factors stem from the Human Component of the accident causation classification,
namely "alcohol", "vigilance", and "experience", from the Vehicle Component, namely "vehicle
condition/maintenance", and from the Environment component, namely "road layout" and "road
condition". This selection resulted from the task 3.1 conclusions and feasibility reasons.
Due to inhomogeneous results for the databases from Austria, France, Germany, Great Britain, and
Spain the detailed results will be pictured in an Internal TRACE Report by Sub-reports of the WP3
Partners, in this task report the main results are discussed with respect to findings and data in other
databases available to the TRACE partners as requested from WP8.
Both methods applied show that trip-related factors are possible to prevent not on a trip level only,
but also from a background level and as well on a level closer to the accident (driving task level).
However, only some suggestions are possible to give by these results. A more detailed view for
preventing the different accidents that result from trip-related factors is necessary, as shown by the
results of BASt with the statistic method, as well as by INRETS with the ultra in-depth WP5 method
