Up to 400 thousand commuters will face more traffic chaos in Dublin from 9 o'clock tonight.

Drivers at Dublin Bus begin their second 48 hour strike from midnight - amid calls for a 15 per cent wage hike.

The company's again decided to recall all vehicles three hours before that - to ensure buses safe return to depots.

Dublin Bus says each day of industrial action is costing it over 600-thousand euro.

SIPTU Organiser John Murphy says there is a possibility the dispute will escalate further: