Pittsburgh driver's test
7: The car directly in front of you has a flashing right tail light
but a steady left tail light.
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.