Colliding with a Car that Is Passing from Behind Who is at fault when a car turns left – colliding with a car that is trying to pass from behind? This scenario is far too common. A rear motorist will attempt to overtake a forward vehicle with little concern about what driving manoeuvre that forward driver is attempting. For example, when two cars are both turning left but the rear vehicle attempts to pass the forward vehicle in the process, it increases the risk that a dangerous accident will happen. Ultimately, a motorist can’t intentionally interrupt another driver’s attempt to safely turn left.