Siptu is warning that industrial action at Dublin bus could take place within the next two weeks.
The trade union's organizers are to meet today to discuss their plans after 95% of members voted in favour of going on strike in their row over pay.
Drivers want the same salary as Luas staff, who got a wage hike earlier this summer.
Siptu Divisional Organiser Owen Reidy has said if things do not change, industrial action could come as soon as two weeks from now.
“Unless Dublin Bus come to the table and are prepared to do something creative and reach an agreement with us in the next week or so, I would anticipate that you would have some form action probably within two weeks,” said Reidy.