Gardaí and the National Transport Authorit have launched a campaign aimed at catching rogue taxi drivers who they believe are overcharging tourists.
The operation is specifically focused on drivers travelling to and from Dublin Airport.
As part of the clampdown officers mounted a checkpoint this afternoon close to the airport.
They detected five drivers taking a longer route and one overcharging.
In a similar operation two weeks ago, gardaí detected six drivers taking the longer route and three overcharging.
Officers are keen to stress that they are focused only on a "small number of drivers".
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Last month, the National Transport Authority published taxi statistics for Ireland.
Overcharging and matters relating to fare accounted for the second largest category of complaints.
Gardaí say the checkpoints will continue for the summer.
The penalty for overcharging is on the spot fine for €60.
Taking a longer route will result in summons in court.
A conviction may result in a fine of up to €2,500.
A spokesperson for the NTA has urged passengers to use the Driver Check app to ensure the vehicle is vetted, licensed and correctly registered.
They added that passengers who think they have been overcharged should keep their receipts and make a complaint as soon as possible.
