The IV´11 is the premier annual forum sponsored by the IEEE INTELLIGENT TRANSPORTATION SYSTEMS SOCIETY (ITSS). Researchers, academicians, practitioners, and students from universities, industry, and government agencies are invited to discuss research and applications for Intelligent Vehicles and Intelligent Infrastructures. This symposium is taking place at Baden-Baden, Germany from 5th to 9th June 2011. There will be offered tutorials on the first day, followed by three days of presentation and a vehicle demonstration day. Technical presentations are characterized by a single session format for multilateral communications in an informal atmosphere.