When can you use the right-turn lane to make a left turn?

Answer: D — You should never use a right-turn lane to make a left turn.

You should never use a right-turn lane to make a left turn. The main purpose of a right-turn lane is to allow drivers to safely turn right without slowing down or impeding the flow of traffic. Using the right-turn lane to make a left turn can be dangerous and unexpected for other drivers on the road. Option A is incorrect because even if there is no oncoming traffic, it is still not safe or legal to make a left turn from a designated right-turn lane. Option B is incorrect because a sign permitting it does not necessarily mean it is safe or legal. Option C is also incorrect because even if the light is green, it is still not appropriate to use a right-turn lane for a left turn.