  Security of Intelligent Transportation Systems (ITS) heavily depends on the
security of the underlying components that create such a smart ecosystem.
Adaptive Cruise Control (ACC) is embedded into most modern vehicles. In this
report, we study the situations that the two vehicles involved in a cruise
control scenario create. More precisely, after breaking down the phases the two
vehicle go through (especially the ego one), we show how a simple formula can
be used to predict collisions in hard brake cruise control scenarios.
