A driverless Luas system is not possible with current technology, according to Transport Infrastructure Ireland.

In a response to a query from Dublin City Council's Transport Committee, TII says that Unattended Train Operation systems are used in a number of European countries, including France and Denmark.

TII Director of Capital Programme Management Peter Walsh says, however, that this is only possible with a segregated rail track, usually travelling underground.

Mr Walsh says self-driving software is not compatible with the Luas.

He said, however, that this is being considered as part of the design for the planned Metro North system.