A Useful Roadmap and Policy Guide will be defined testing the interest of soft policies proposed by the “Libertarian Paternalism”, as defined by Richard Thaler and Cass Sunstein, such as better information, communication, and education (“nudges”), as well as regulatory changes, key incentives and subsidies. REBALANCE will propose a new definition of “Public Interest” (an “indeterminate legal concept”) to assess transport policies in European and possibly national regulations. Changes in the official Cost-Benefit Analysis19 guides and other impact assessment methods will be proposed to those European institutions responsible for (e.g. INEA, EIB, DGREGIO, EEA…). (WP5)