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Drinking and driving

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  • Release date: 9 February 2017
  • Period covered: 2015
An annual report which presents information about association between drink driving and accidents, results of breath tests of drivers involved in accidents and enforcement action relating to drink driving.

Key points

  • In 2015, 7.1 per cent of all drivers of motorised vehicles and 14.3 per cent of motorcyclist drivers/riders killed in traffic collisions were above the drink drive limit.
  • The Department of Transport (DfT) report that 5.4 per cent of killed and serious injury accidents (KSI) that occurred in Wales in 2014 involved drivers over the blood alcohol limit.
  • In terms of road accidents, police officers’ views about the contributory factors that led to accidents suggested that 8 per cent of KSI accidents during 2015 involved drivers that were impaired by alcohol.
  • In 2015, 63 accidents where the reporting police officer identified pedestrian(s) being impaired by alcohol as a contributory factor to that accident.
  • In 2015, there were approximately 5 accidents where the driver was impaired by alcohol, for every 1 accident where a driver was impaired by drugs.

Breath tests of drivers taken after accidents show:

  • Considerable variation between the months of the year and the same months in different years with a 5.7 per cent reduction in positive tests observed when compared to the 2014 data.
  • Drivers are 2.8 per cent more likely to test positive at the weekend.
  • 64.6 per cent of drivers test positive between 18:00 to 03:59.


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