The ratio of drivers caught drink or drug driving during a summer crackdown by Cumbria Police has doubled.
8% of motorists stopped by officers on the county's roads in June were under the influence, compared with 4% last year.
Of 501 breath tests, 41 people failed or refused to provide one - 23 of the drivers who failed had been involved in a crash.
The constabulary's putting the percentage increase down to more targeted stop-checks as well as stricter laws on drug-driving.
Chief Inspector Matt Kennerley, from the Operational Support Unit, said: “This year saw a focused targeting of suspected offenders. This has led to the percentage increase doubling from the 2014 summer campaign. Results like this are always disappointing as it shows that motorists continue to gamble their own or other road user’slives by driving under the influence of alcohol or drugs.
“Any amount of alcohol or drugs can affect a motorist’s ability to drive safely. Our advice to all motorists is that if you’re planning on driving a vehicle, do not drink any alcohol or take drugs. Different amounts of alcohol or drugs can have different effects due to a wide range of variables.
“Over half those caught under the influence were following collisions, if people continue to drive whilst they have alcohol or drugs in their system it will only be a matter of time before we are dealing with the fatal consequences.
“As a force we will continue to target drink and drug drivers as part of our work to make Cumbria’s roads safer.”
Chris Broadbent, of the Cumbria Road Safety Partnership, said: “This is a vital campaign which we support every year that aims to stop people from driving whilst under the influence of alcohol or drugs.
“The results provide evidence that there are people who continue to risk lives by acting irresponsibly. As a road safety partnership we will continue to tackle this issue and aim to make the county’s roads safer.”
Police and Crime Commissioner Richard Rhodes said: “It is disappointing to hear that despite the best efforts of the police and our road safety partners, there are still some individuals who clearly flout the law and have no regard for their safety, or that of other innocent road users. This is why we need to continue to do what we can do raise awareness through campaigns such as this.”