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.
