What causes fatal road collisions in Great Britain

Speed, alcohol, drugs and not wearing a seatbelt are the four factors most consistently linked to deaths on Great Britain's roads, according to the Department for Transport's analysis of reported fatal collisions.

The Department for Transport publishes detailed factsheets breaking down the circumstances behind fatal crashes, looking at how often each of these factors appears in the official record. The data covers reported collisions only, meaning incidents that were attended by police and formally logged, so the figures represent a minimum picture rather than a complete one.

Speed is a recurring presence in the fatal collision data, both in terms of vehicles travelling above the posted limit and in cases where speed was judged inappropriate for the conditions even within legal limits. Alcohol and drug impairment also feature prominently, reflecting long-standing concerns about drivers getting behind the wheel while unfit to do so.

Seatbelt non-wearing continues to account for a meaningful share of fatalities, a finding that underlines how often a preventable decision contributes to a death that might otherwise have been a serious but survivable injury. The Department for Transport also produces a separate factsheet focused specifically on child casualties aged up to 15, covering the circumstances in which younger road users are hurt or killed in reported collisions across Great Britain.