In 2019, the Radbahn vision turned into a feasible pilot project: Reallabor Radbahn. The purpose of the project is to critically review and further develop the original Radbahn concept and to establish a basis for decision-making regarding the construction of the entire Radbahn route.

Together with the Berlin Senate Department for Urban Development and Housing, paper planes applied for funding through the federal program National Projects of Urban Development. The program supports conceptual and physical projects that demonstrate particularly high urban development quality, promote participation processes and show great innovation potential. The application was successful, as a result of which the federal government and the state of Berlin are funding the Reallabor Radbahn until the end of 2023.