This study identifies 'success stories' in the road transport sector in Europe. Using reduction of greenhouse gases and additional ancillary benefits as criteria to determine success, the Transport Research Laboratory (TRL) undertook an extensive review of case studies from across the European Environment Agency (EEA) member countries by going through more than 10 different databases. This initial review identifies six good examples of post-implementation evaluation reports, including results on carbon dioxide (CO2) emission reductions. The success stories represent various levels of implementation (national, local/city level, and organization/business); a range of target groups (private, public, and freight); types of measure (planning, regulatory, economic, and information); and types of impact (environmentally friendly vehicles, transport efficiency, mode shift, and urban planning).