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This book constitutes the proceedings of the 14th International Workshop on Communication Technologies for Vehicles, Nets4Cars/Nets4Trains/Nets4Aircraft 2019, held in Colmar, France, in May 2019.

The 9 full papers and 1 short paper in this volume were carefully reviewed and selected from 15 submissions.

The volume features contributions in the theory or practice of intelligent transportation systems (ITS) and communication technologies for:

- Vehicles on the road: e.g. cars, trucks and buses;

- Air: e.g. aircraft and unmanned aerial vehicles; and

- Rail: e.g. trains, metros and trams.

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Road.- Towards a 5G vehicular architecture.- Impact of driver reaction and penetration rate on GLOSA.- Unsupervised Driving Profile Detection using Cooperative Vehicles´ Data.- Cyber Attack Detection Algorithm Using Traffic Flow Theory.- Intelligent Transport System based on Bluetooth.- Linkage of IoT Technologies with the SWE (SOS) Standard for the Development of a Heterogeneous Intelligent Transport System (Case Study Quito).- Air.- Performance evaluation of an AANET in Quito´s control area.- GreenSword: Green Space Cleaning Using an Autonomous Swarm of Heterogeneous Drones - First Retex.- DroneBallCup: When Drones Play Volleyball - First Implementation.- Rail.- Hardware-in-the-loop and Software-in-the-loop platform for test and validation of adaptable radio communications systems for railways at IP layer.

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