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Nottinghamshire and Thames Valley Police provided offence history data for 4,639 active road users involved in OTS investigated collisions.
Broadly categorised and anonymised offence data were sourced through Police National Computer and Driver and Vehicle Licensing Agency records. This was linked to OTS data to create a unique dataset at each research centre Transport Safety Research Centre and Transport Research Laboratory.
Police data coders were able to confirm the identity of 4,089 road users, and of these 1,910 had at least one offence identified (47%).