Aucklanders taking the train to work on Wednesday should get in early, with no trains running between 9.30am and 2pm.
Auckland Transport passenger train services will not run between these hours due to a scheduled Rail and Maritime Transport Union (RMTU) meeting.
The cancellations will halt services for two hours either side of the meeting, which is between 11am and 1pm, so that members have time to get to the meeting.
However, services will return to normal afterwards.
The union meeting has been scheduled for operational staff to discuss a range of matters relating to their employment agreement.