All Dublin Bus services have now finished around the capital, ahead of a 48-hour long work stoppage.
Thirteen more days of industrial action spanning this month and the next are planned, if no resolution is forthcoming.
Union members are seeking a 15% pay rise for workers over the 36 months, as well as a payment in lieu of an agreed 6% increase that was deferred back in 2009.
According to Dublin Bus sources, the current industrial action has cost the company somewhere in the region of 4m so far.