Road accident investigation: road accident in-depth studies

This programme investigates a sample of road traffic collisions, comparing data with injury outcomes to develop road safety initiatives.


The Department for Transport has investigated road traffic collisions for many years to support strategies to make our roads safer. These investigations differ from those of the police because they are designed to understand how people are injured rather than necessarily determine responsibility for the collision.

Road accident in-depth studies (RAIDS) brings together different types of investigation from earlier studies into a single programme combining existing data with new in a common and comprehensive database.