When responding to an emergency, what is allowed for the driver of an emergency vehicle with a class 4 licence?

Answer: D — All of the above

The driver of an emergency vehicle with a class 4 licence is allowed to proceed through a stop sign, exceed the posted speed limits, and proceed through a red light controlled intersection, all with due care. Option B, exceeding the posted speed limits, may seem incorrect because speeding is generally not allowed, but in certain emergency situations, it is necessary for an emergency vehicle to reach its destination as quickly as possible. Option A, proceeding through a stop sign, may also seem incorrect, but again, with due care and caution, it may be necessary for the safe and timely navigation of an emergency vehicle. Similarly, option C, proceeding through a red light controlled intersection, may seem incorrect, but with due care and caution, it may be necessary to ensure the safety of the emergency vehicle and those on the road. Therefore, option D, all of the above, is the correct answer.