Simulation of Cyberattacks in ITS-G5 Systems -- Towards an Extensible Security Monitoring Architecture for Vehicular Networks -- Anomaly Detection On Roads Using C-ITS Messages -- Leveraging GPS data for vehicle maneuver detection -- Analysis and Comparison of IEEE 802.11p and IEEE 802.11bd -- An investigation of the bits corruption in the IEEE 802.11p -- Measurements of communication channel in different scenarios with the Channel Characterization Tool system -- Survey on decision-making algorithms for network selection in heterogeneous architectures -- Radio Access technologies selection in vehicular networks: state-of-the-art and perspectives for autonomous connected vehicles -- Toward the integration of V2V based clusters in a global infrastructure network for vehicles -- Integration of Antennas for communication systems on complex platforms -- 5G for remote driving of trains -- Sensing the Health of the Catenary-Pantograph Contact on Railway Vehicles with Radio Receivers: Early Results -- Freight Telematics Systems: An Intelligent Wagon -- NEWNECTAR: a New gEneration of adaptable Wireless sensor NEtwork for way side objeCTs in rAilway enviRonments -- Allowing People to Communicate after a Disaster using FANETs -- Remote ID and Vehicle-to-Vehicle Communications for Unmanned Aircraft System Traffic Management -- A Unified Smart Mobility System Integrating Terrestrial, Aerial and Marine Intelligent Vehicles.

This book constitutes the refereed proceedings of the 15th International Workshop on Communication Technologies for Vehicles, Nets4Cars/Nets4Trains/Nets4Aircraft 2020, held in Bordeaux, France, in November 2020. The 18 full papers were carefully reviewed and selected from 22 submissions. The selected papers present orig-inal research results in areas related to the physical layer, communication protocols and standards, mobility and traffic models, experimental and field operational testing, and performance analysis.