Mr. Peter Walsh:

I do not have the figure to hand but I am sure we can isolate that and come back to the Deputy. On the question of how detailed the plans were, we had to look at the impact of the construction on the existing green line because it is a valuable piece of infrastructure that carries an awful lot of people. We needed to identify the length of time it would be disrupted and the mechanism by which we could facilitate the onward journey of passengers. Such a project would be done in pieces and people would have to be bussed around. The detail of that had to be worked out and it was through that process that we were able to be definitive about the level of risk we were bringing. There was also the fact that we were going to an automated system. In the original thinking, the use of line-of-sight vehicles, similar to the Luas, was envisaged. The efficiency and appropriateness of the automated system then changed that.