Introduction
Initiatives to create safer and more efficient driving conditions have recently begun to draw strong support. Vehicular communications (VC) will playa central role in this effort, enabling a variety of applications for safety, traffic efficiency, driver assistance, and infotainment. For example, warnings for environmental hazards (e.g., ice on the pavement) or abrupt vehicle kinetic changes (e.g., emergency braking), traffic and road conditions (e.g., congestion or construction sites), and tourist information downloads will be provided by these systems.