Hundreds of drivers across Fenland were spot-checked during a police crack-down on drink-driving over the festive season.
Almost 700 motorists in Cambridgeshire were stopped during a road safety campaign over a weekend of action.
This year, for the first time, a roadside screening drug wipe test was available to test for cannabis and cocaine.
A total of 400 motorists were stopped across Fenland when 15 breath tests were conducted.
Two people were arrested after testing positive for drug use.
The Special Constabulary were out in force supporting the campaign with 11 Specials working in Cambridge and two in Fenland.
A total of 280 spot-checks were carried out in Elizabeth Way and Victoria Avenue in the city centre of Cambridge.
Up to 70 breath tests were carried out with the highest reading being 31.
The legal limit for drink-driving is 35 microgrames of alcohol in 100 millitres of breath.
Vic Kerlin, head of Cambridgeshire Special Constabulary, is hoping the crack-down will help to attract more volunteers to join up.
He said: “The training and opportunities the Special Constabulary receive has come a long way and this is evident by the Specials being involved in force operations like the spot checks.
“We are currently recruiting for our Special Constabulary so if you feel you, or somebody you know, can step up to the plate then please visit the Special Constabulary pages on our website http://www.cambs.police.uk/recruitment/specials/”
For more information about drink-driving, visit the force webpages via www.cambs.police.uk/roadsafety/drinkdriving.
If you know someone who drink-drives, or suspect someone is about to, you can report via a confidential hotline by calling 0800 032 0845.