Officers have been out across Calderdale in a bid to stop people drink and drug driving.
Check points are being set up by police, working with neighbourhood policing teams, throughout December to test drivers for alcohol and illegal substances at night and early mornings.
One of the checks, carried out in Halifax town centre between 10pm on Sunday and 2am on Monday, saw 46 drivers stopped.
Of those, none were found to be over the limit.
Inspector Dorian James, who leads the Western Area Roads Policing Team, said: “Roads policing officers working alongside thier colleagues across Calderdale will be conducting a significant number of these focused drink and drug driving initiatives over the festive period.
“I would remind those going out to enjoy themselves to do so responsibly. Use a designated driver who has no alcohol and please be mindful that it is still possible to be over the limit the following morning.”
Last year’s campaign saw 1,531 breath tests carried out across West Yorkshire. Of these, 15 per cent led to an arrest being made.