Motorists have been urged to ensure that their vehicle's number plates are clearly legible and not obscured by dirt.
It is an offence under the Vehicle Registration and Taxation Regulations, 1992 if a number plate is not easily identifiable.
The registration plates at this time of year are dirty due to muddy road conditions and the numbers and letters are often obscured.
As well as the legal requirement, dirty plates can't be read by speed vans and cameras or the Garda's plate recognition technology in patrol cars.
Cameras a toll bridges will also have difficulty in photographing the plates.
Gardai Kildare Garda checkpoints have been giving advice to drivers on the issue and instructing them to have their plates clean and visible.
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