More than 140 motorists were stopped by officers in a special show of force in Calderdale, focused on the Todmorden area.
The final evening of February saw Special Constables - who volunteer their time to the force on top of regular “day jobs” - out and about on the district’s roads keeping a watchful eye out for criminals in the area.
They teamed up with their “regular” colleagues from the West Yorkshire Police Roads Policing Unit and the Greater Manchester and Lancashire police forces to throw a ring of steel around the area, said a spokesman.
They carried out 143 checks on drivers and issued two traffic reports to motorists for having no MOT, sent one driver on a speed awareness course and issued a warning for possession of cannabis.
A 44-year-old man from Burnley was also arrested on suspicion of drink driving. The Specials also seized a car as its driver was accused of having no insurance.
Chief Inspector Steve Thomas, of Calderdale Police, said: “This was a special operation in more ways than one.
“Firstly it meant we were able to combine our Special Constables - who have the same powers as their regular colleagues - with other West Yorkshire officers and officers from other local forces.
“And secondly we were able to have a highly visible presence across the area. This meant we were able to speak to legitimate motorists going about their daily business and offer them crime prevention advice and deal with anyone we found breaking the law. By having such a visible presence we were also able to deter other criminals thinking of committing crime in Calderdale.
“The show of force clearly had an impact.
“The operation focused on the Todmorden area and resulted in no acquisitive crime - that’s theft - at all being reported to us in the area for that night.
“It highlighted we can carry out such operations with Specials and other forces to make a real impact, to show criminals they have nowhere to hide and help reassure law-abiding residents Calderdale is a safe place to live.”