The proceedings contain 20 papers. The topics discussed include: VANET architectures and protocol stacks: a survey; behavior specification of a red-light violation warning application - an approach for specifying reactive vehicle-2-X communication applications; wireless protocol design for a cooperative pedestrian protection system; a vehicular mobility model based on real traffic counting data; driver-centric VANET simulation; simulative evaluation of the potential of Car2X-communication in terms of efficiency; performance study of an in-car switched Ethernet network without prioritization; degradation of communication range in VANETs caused by interference 2.0 - real-world experiment; real-world measurements of non-line-of-sight reception quality for 5.9GHz IEEE 802.11p at intersections; and interoperability testing suite for C2X communication components. © Springer-Verlag Berlin Heidelberg 2011