No rush hour on ant highways

The traffic congestion of Celtic Tiger days is back. During that misguided era, we commandeered huge swathes of countryside and obliterated ancient sites to make way for cars.

But the motoring monster still wants more. To paraphrase Cyril Northcote Parkinson; the number of vehicles expands to fill the space made available for them. Why can’t we utilise our existing roads more efficiently?