Can you use a designated left-turn lane for through traffic?

• A. Always.
• B. Only when directed by signs.
• C. In heavy traffic.
• D. Generally never.

Answer: (D)

A designated left-turn lane is created to separate turning vehicles from through traffic and improve safety and flow at intersections. It is marked specifically for left turns, with signals or signs directing drivers to turn there. Because of that purpose, through traffic should not use that lane to go straight. Using it for going straight can block turning vehicles, force abrupt braking, and create conflicts with oncoming traffic and pedestrians. The only time you use a left-turn lane is when you intend to make a left turn and follow the lane markings and signals accordingly. If you accidentally drift into that lane while not turning, you should safely clear it as soon as possible and stay in the through lane.