I'm trying to find the information on this though apart from being in a meeting as a kid and my Father talking about it ad nauseum since. As far as I remember a FG TD from West Dublin, who served one term (I'll wiki it shortly) put forward a proposal to co-ordinate an underground and above ground service in Dublin city and county that would have cost very little and taken in areas about to be expanded into. He fought tooth and nail for it (which is where I remember it from being at a talk/meeting) and he was shafted by FG and their buddies. Apparently roads were the main thing and removing the above ground construction lobby (which remains the power) meant he was running the gauntlet of the powers that be.