Europe’s Rail and SESAR 3 Joint  Undertakings have published a joint call for the development of an “Integrated  air and rail network backbone for a sustainable and energy-efficient multimodal  transport system”. The call targets solutions that will improve door‐to‐door mobility for Europe’s  citizens, and is expected to generate synergies between the air and rail  innovation communities. With a total investment of EUR 7 million, the call is  being co-funded within the framework of the EU’s Horizon Europe research and  innovation programme.