The case for a large program of road-building to feed economic growth is immense – yet unsayable Rob Henderson is justly famous for coining the phrase “luxury beliefs.” These are opinions which are unshakeably held irrespective of any countervailing evidence, either because the display of such opinions confers status on the holder, or else because adherence to them is an article of faith among some social or professional group in which you need to be seen to belong. The only approved vision of