Cellular Vehicle-to-Everything (C-V2X) is a communication technology that enables vehicles to connect with each other, infrastructure, and even pedestrians. This system uses cellular networks to share real-time information, improving road safety and traffic efficiency. For example, vehicles can alert each other about hazards or traffic conditions, helping drivers make informed decisions. C-V2X operates in two modes: direct communication between vehicles and communication through cellular networks. This flexibility allows for a wide range of applications, such as autonomous driving, traffic management, and enhanced navigation. Overall, C-V2X aims to create a smarter and safer transportation ecosystem.