RADEF (Road Administration Data Exchange Format) is a research and development project of the EU DGVII at European level, which directorates, in close cooperation between the DGVII and European Road (Direction of European Road Directors, Sub Group 5) is realized.

Object and purpose of RADEF project is to exchange road-relevant data (traffic, obstacles, traffic jams, accidents, etc.) across borders compatible for the Trans European Road Network (TERN) and these data to the Statistical Office of the European Union (EUROSTAT) to save.

1996 - 1997 a data catalog for various disciplines (road network, traffic, accidents, etc.) was created in a first project. In addition, a conceptual data schema and an application for data exchange has been developed. The application has been tested in Denmark, Great Britain, Belgium and Switzerland.

In a second project, the Road Administration Data Exchange Format  is now connected with new technologies (GIS: Geographic Information Systems, Internet).