ample. When solutions are proposed for the V2X communications, it is important to consider some of the differences that would be involved if the solution is for V2I or V2V. In case of V2I communications, we have fixed infrastructure elements generally called roadside units (RSU) that are located along the roads and streets and work similarly to an access point in a wireless local area network. Vehicles try to communicate with the infrastructure, and some of the problems in such a link will be caused by issues such as propagation, mobility, environment, and obstacles that cause channel impairments such as losses, Doppler, multipath, fadings, and distortion. In some cases, handoffs need to be included in order to provide constant communication as the vehicle moves along the road. In contrast, for V2V communications, we have the same kind of channel impairments, in some cases in critical levels, for example, when communicating vehicles move in opposite directions. Also, depending on the installation of RSUs, there could be a direct connection between vehicle and infrastructure, whereas for the V2V channel, we could have more obstacles obstructing the line of sight (LOS) between vehicles. For V2X (V2I and V2V), channel parameters such as coherence time and coherence bandwidth also play important roles due to the mobility. It is also important to have measurement campaigns in order to collect data that help to establish the behavior of the signals in such environments. The characterization of all possible scenarios is critical to understand the effect of the channel in the communication links. L. Azpilicueta et al. In the automotive industry, there are two issues that are paving the road for the future. The first is electromobility that provides sustainable vehicles with low to zero emissions. The hybrid or electric vehicle will have many different systems integrated that need from sensors to monitor the environment. Intravehicular communication can be done in many different ways, and the CAN bus has been part for som