As few as 10 taxi drivers have mounted a picket at the roundabout at the entrance to Dublin Airport in the first of a series of strikes at the airport.
The stoppage appears to have had little affect on passengers travelling into Dublin city so far.
The taxi drivers are SIPTU members and have halted work in protest against what they claim is a rising number of new taxi drivers who are engaged in criminal activity.
The work stoppage started at 9 a.m. and is expected to end at 1 p.m.
A SIPTU Dublin taxi drivers' official, Mr Jerry Brennan, said: "Drivers are asking questions about their ability to continue making a viable living from driving a taxi. Their working conditions are now seriously under threat as the industry becomes completely unregulated".
The next stoppage is planned for tomorrow evening, from 7 p.m. - 11 p.m., to be followed by a further stoppage on Monday, February 10th, from 9 a.m. to 1 p.m.