There is a danger that the increase in road traffic and its concentration on high-speed roads will shortly lead, particularly along the north-south axis, to congestion that will be intolerable both to users and those living nearby. In their report, Messrs Jean-Marie Demange, deputy, and Pierre Vallon, senator, note that it will be increasingly difficult to create new roads, review certain technical innovations that should lead to better use of the road system, to greater use of other modes of transport, and to combined forms of transport. In this way technical advances could bring original approaches into transport policy, avoiding the extremes of interventionist authoritarianism and "masterly inaction", both of which are unacceptable in the present state of our society and our economy.