V2V communication allows vehicles to communicate with each other to exchange information. It uses DSRC technology to broadcast information such as speed, braking status and location to nearby vehicles. The goal is to reduce accidents by extending drivers' vision and alerting them to potential hazards, such as stopped traffic or vehicles merging into their lane. Key aspects of V2V include ultrasonic sensors to detect objects and measure distance, Zigbee protocols to transmit data between vehicles, and alerts through seat vibrations, voice or displays within 1000 meters. While it aims to improve safety and traffic flow, issues remain regarding total reliance on the technology and potential for incorrect signals.