With the Air2X project the DLR Institutes of Transportation Systems, Flight Guidance and Flight Systems are breaking new ground. After all, communication between aerial and ground vehicles is a new field of research, but one that has great potential. In this film the researchers directly implemented the communication of a drone - exemplary for a helicopter - with vehicles on a test site. This enables the drone to automatically transmit its planned landing site and inform vehicles that have a corresponding communication interface. A digital barrier prevents these vehicles from entering the desired landing zone. This also creates a physical barrier for all following vehicles in their lane. With this unique communication technology air rescue operations can be carried out more safely and quickly by helicopters on freeways.