MSPs are to debate Scottish Government proposals to reduce the limit for drink-driving.
The Government has set out plans to lower the existing blood/alcohol limit of 80mg/100ml to 50mg/100ml, and a public consultation on the issue is ongoing.
Powers to set drink-driving limits are among those transferred from Westminster to Holyrood under the Scotland Act (2010-12).
Lowering the limit to 50mg would bring Scotland in line with other European countries such as Germany, France and Spain.
The move has already been cautiously welcomed by road safety campaigners, as a zero-tolerance approach is their ultimate aim.
Commenting on the proposal, Sarah Fatica, general manager at road safety charity Brake, said: "Whilst 50mg is a step in the right direction, what we really need to see is a strong message from our governments in Scotland and Westminster to say that not a drop (of alcohol) is acceptable if you are behind the wheel."
Justice Secretary Kenny MacAskill, speaking when the plans were first announced earlier this year, said: "The Scottish Government has long called for a reduction in the drink-driving limit to 50mg. We strongly believe that reducing the drink-driving limit will save lives, and evidence from across Europe shows that alcohol-related road deaths drop dramatically where the limit has been reduced."
Mr MacAskill has also written to UK Transport Secretary Patrick McLoughlin asking for the devolution of additional powers over areas such as breath testing, drink-drive penalties and differential limits.
"We wanted a package to be devolved that would allow us to consider whether the police should be able to carry out breath testing drivers anytime, anywhere and powers to consider changing the penalties for drink-driving," Mr MacAskill said. "We also called for the chance to consider differential drink-driving limits. For example, for young and novice drivers. None of these were devolved by the UK Government and I have written to the Secretary of State for Transport calling for the UK Government to reconsider."
Mr MacAskill's plea comes after the Reported Road Casualties Scotland 2011 report showed that an estimated 750 casualties including 20 deaths were due to drink-drive accidents in Scotland in 2010.