Pittsburgh Driver's Test (7) The car directly in front of you has a flashing right tail light but a steady left tail light. This means (a) one of the tail lights is broken; you should blow your horn to call the problem to the driver's attention. (b) the driver is signaling a right turn. (c) the driver is signaling a left turn. (d) the driver is from out of town. The correct answer is (d). Tail lights are used in some foreign countries to signal turns.