This book constitutes the joint refereed proceedings of the 5th
International Workshop on Communication Technologies for
Vehicles/Trains, Nets4Cars 2013 and Nets4Trains 2013, held in Vilnius,
Lithuania, in May 2013. The 12 full papers of the road track and 5 full
papers of the rail track presented together with 3 invited talks were
carefully reviewed and selected from 24 submissions. They address topics
such as intra-vehicle, inter-vehicle and vehicle to infrastructure
communications (protocols and standards), mobility and traffic models
(models, methodologies, and techniques), testing, and applications.