You may pass on the left when the left lane is designated for passing and the way is clear.

• A. Only on a one-way street
• B. When the left lane is designated for passing and the way is clear
• C. When the other vehicle is signaling to turn right
• D. On a traffic signal that is flashing yellow

Answer: (B)

Passing on the left is allowed only when the left lane is designated for passing and the way is clear. This means that lane is specifically marked for overtaking slower vehicles, so you may use it to pass if you can do so safely. Before moving, signal, check mirrors and blind spots, and make sure there’s enough room to complete the pass without cutting in front of the other driver. Return to the right lane as soon as you’ve safely passed and you’re clear of the vehicle you overtook, staying within the speed limit. The other scenarios don’t justify a left pass: a left lane not marked for passing isn’t a permissible place to overtake, a vehicle signaling to turn right doesn’t authorize passing, and a flashing yellow signal is a caution, not a green light to pass.