Question to the Department for Transport:

To ask the Secretary of State for Transport, what information her Department holds on road traffic collisions in which the at-fault driver was taking a dopamine agonist, and on those incidents where (a) speed, (b) loss of control and (c) impulsive risk-taking were recorded as contributory factors.

This information is not held.

Data on deaths and injuries in reported road collisions is based on information reported to the Department by police forces in Great Britain via the system known as STATS19.

STATS19 does not collect information about whether a driver involved in a road casualty collision has been prescribed or taken a dopamine agonist. Additionally, STATS19 does not assign blame to any of the participants in road casualty collisions, so it is not possible to provide the number of collisions where the at-fault driver was taking any drug.

The Department does receive coroner and procurator fiscals’ reports for some deceased drivers involved in road collisions. A feasibility study has been published using this data and STATS19 data to provide some insight into what type and levels of drugs are detected in deceased drivers. This is published at:

https://www.gov.uk/government/statistics/developing-drug-driving-statistics.

Data concerning contributory factors and road safety factors which provide some insight into why and how road collisions occur are published at:

https://www.gov.uk/government/statistical-data-sets/road-safety-statistics-data-tables#road-safety-factors.