Bus Eireann drivers are starting to abandon their pickets at Irish Rail and Dublin Bus depots.
The secondary demonstrations stopped hundreds of thousands of passengers using public transport this morning and knock-on delays are likely to continue throughout the day.
Irish Rail said practically all DART, Dublin Commuter and Intercity routes were cancelled - while the vast majority of Dublin Bus services were not running this morning.
The transport companies have been tweeting updates but advising delays:
#DBSvcUpdate Secondary pickets have now been lifted. Please expect delays as we return to normal service:https://t.co/1vgVyVMV6F
— Dublin Bus (@dublinbusnews) March 31, 2017
Update: DART services are now resuming, Knock on delays can be expected until lunchtime today.
— Iarnród Éireann (@IrishRail) March 31, 2017
We will resume services ASAP but knock-on impact until at least lunchtime. Also train sizes may differ from planned as trains out of place
— Iarnród Éireann (@IrishRail) March 31, 2017
Workers were demonstrating solidarity with their Bus Eireann colleagues whose all-out strike over cuts has entered its eight day.
Passengers are advised to check the Irish Rail and Dublin Bus websites for full details.
Transport Minister Shane Ross condemned what he calls the "unofficial and unjustified protest" and says his first concern is for the passengers affected.