Public transport advocates are calling for an urgent government inquiry into Auckland's rail network after yet another failure on Thursday.

An infrastructure issue brought train services to a halt during the morning commute, bringing more frustration for Aucklanders.

The network has been plagued by delays and cancellations, and last week, dozens of trains were cancelled when the tracks overheated.

The Public Transport Users Association says the rail network is failing commuters and questions need to be asked about how the network is being run.

National coordinator of the association Jon Reeves spoke to Charlotte Cook.