Dyfed Powys Police are clamping down on people who drive illegally.
A campaign is being run to make people aware that if they drive without insurance, they will have their car seized.
The campaign includes bill board and bus advertising and is accompanied by enforcement activity.
Dyfed Powys Police seized 1,300 vehicles between January and November last year where drivers had no insurance or were driving not in accordance with a licence.
Chief Inspector Steve Matchett, of the Roads Policing Unit, said: "Our aim is to allow law-abiding people to use the roads safely by targeting those who are intent on using them unlawfully or for unlawful purposes.
"Previous experience has shown that the persons driving without the correct documents are also more likely to show disrespect for other road laws potentially putting other people in danger.
"If you are driving illegally and you are stopped by police, your vehicle will be seized. It will then cost you to get it released and if you don't pay within a certain time limit your vehicle will be crushed.
"Drivers sometimes think they will not bother with the cost of insurance. However, if you drive your vehicle on a road, you have a responsibility to ensure everything about the vehicle and yourself is legal. You require a valid driving licence and valid insurance."