  This paper concerns the performance of vehicle-to-everything (V2X)
communications. More precisely, we analyze the broadcast of safety-related V2X
communications in cellular networks where base stations and vehicles are
assumed to share the same spectrum and vehicles broadcast their safety messages
to neighboring users. We model the locations of vehicles as a Poisson line Cox
point process and the locations of users as a planar Poisson point process. We
assume that users are associated with their closest base stations when there is
no vehicle within a certain distance $ \rho $. On the other hand, users located
within a distance $ \rho $ from vehicles are associated with the vehicles to
receive their safety messages. We quantify the properties of this
vehicle-prioritized association using the stochastic geometry framework. We
derive the fractions of users that receive safety messages from vehicles. Then,
we obtain the expression for the signal-to-interference ratio of the typical
user evaluated on each association type. To address the impact of vehicular
broadcast on the cellular network, the paper also derives the effective rate
offered to the typical user in this setting.
