Obviously deaths in Scotland are lower the England, far lower population.
When you do it per population Scotland is worse compared to England.
Wales and Ireland fair even worse compared to England.
2023 Fatalities and Rates (per million population)
Country
Fatalities (2023)
Population (mid-2023)
Rate per million
England
~1,370
57,690,300
~23.7
Scotland
155
5,490,100
~28.2
Wales
101
3,164,400
~31.9
Northern Ireland
71
1,920,400
~37.0
No, there has not been a noticeable reduction in alcohol-related road accidents in Scotland attributable to the introduction of the 50mg/100ml drink-drive limit in December 2014.
Multiple independent studies, using natural experiment designs comparing Scotland to England and Wales (where the limit remained 80mg/100ml), found no significant impact on overall road traffic accidents (RTAs), including fatal, serious, or slight injuries.
A 2019 study published in The Lancet evaluated the effects of the lower limit and concluded it "did not have the intended effect of reducing RTAs."
A 2021 study in the Journal of Health Economics similarly found "no effect" on any type of road accident, including those involving alcohol.
NIHR-funded research in 2019 noted the change was "not linked to reduced road traffic accidents," possibly due to insufficient enforcement or publicity.
While drink-driving offences initially dropped by about 12.5% in the first nine months after the change (per police figures), this did not translate into fewer accidents. Long-term trends show a general decline in road casualties across the UK (including drink-related ones), but analyses attribute no additional reduction in Scotland to the lower limit specifically.
Some slight decreases in monthly accident rates were observed (e.g., from ~740 to ~704 per month in one analysis), but these were not statistically significant or causally linked to the policy. Experts suggest the lack of impact may stem from limited enforcement, as the policy relied more on deterrence than increased breath testing.
In summary, the evidence consistently shows the lower limit alone did not produce a noticeable reduction in alcohol-related accidents.