Vehicles could communicate with each other using vehicle-to-vehicle (V2V) communication networks. This would allow them to exchange information to provide safety warnings and traffic information without needing infrastructure. The document discusses research on V2V systems and applications, including extending driving vision, accident detection, and traffic management. It then describes a project to build a V2V communication platform using Raspberry Pi devices and an ad-hoc mesh network to enable applications like traffic flow management and group messaging between vehicles.