The meeting has been organised by the Amalgamated Workers Union NZ. It will take place from 11am to 1pm on Thursday, during which time most bus services will not operate.
Services are likely to be impacted from 9am as buses start to come off route but ECan expects all services to be operating as normal by 3pm.
School services will not be affected, ECan said.
ECan says customers should be aware that some trips may end at the bus interchange from about 9am as drivers head in to attend the meeting.
Some services will operate again before 3pm.
Public transport users should check the Metro website for the latest timetable updates.