Mr. Ciar?n Rogan:

----- a software bug, or that the prediction algorithm is incorrect, or it could be that the information being fed from the bus location is incorrect. There has been a series of fixes between September, October and November, until 1 December, on all the systems which has improved the accuracy and the way the systems has worked together.

Errors can also occur if, for example, a journey is cancelled and that information - which is fed in manually by a Dublin Bus or Go-Ahead Ireland controller, I presume - is not processed in a timely fashion, that would then generate incorrect information. Both the manual processes have been improved together with software fixes.