The drink-drive limit should be lowered in England and Wales to match the threshold in Scotland, according to the Police Federation.
The federation, which represents police officers, suggested the limit should be reduced from 80mg of alcohol in 100ml of blood to 50mg. It also warned about the rising increase in the number of women caught drink-driving.
Victoria Martin, a Police Federation representative said: “We would like to see a lower drink-drive limit, as Scotland have, which saw a marked reduction in failed breathalyser tests as soon as the law changed.”
Martin will also address figures from Social Research Associates that showed that nearly in one in six women who responded to a survey last year knowingly driving above the drink-drive limit. Many were unaware how much alcohol would put them over the threshold.
Previous campaigns have shown a decline in the number of men caught drink-driving.
Calls for a lower drink-drive limit were also found in a recent survey of 2,200 motorists from car insurance company Direct Line.
Around half of adults surveyed think alcohol limits should be revised for young and novice motorists. More than a third said the limit should be zero, particularly for younger drivers or for those who have recently passed their test.