  This paper studies how the interference of vehicular communications affects
the safety of vehicles in a vehicular ad hoc network. Different signal
propagation models with and without carrier sensing are considered for the
dissemination of periodic safety messages. Then, by employing the results for
different packet success probability of the vehicles, we compare the expected
collision probability of vehicles for different signal fading models. Our
results show how the collision probabilities of vehicles in the network vary
with respect to different models and designs.
