Which statement best describes the designated left-turn lane for through traffic?

• A. They are always for through traffic.
• B. They are generally never for through traffic.
• C. They are sometimes used for through traffic when directed by signs.
• D. They are not used in urban areas.

Answer: (B)

Designated left-turn lanes are built to give space for vehicles turning left and to keep through traffic moving safely. Because their purpose is to accommodate turning, through traffic isn’t expected to use that lane. It’s intended for left turns only, so in normal driving you should stay in the through lane unless you plan to turn. Signs might occasionally allow unusual movements, but the general rule is that left-turn lanes are not used by through traffic. That’s why the statement that they’re generally never for through traffic best fits how these lanes function, and the other options misstate their purpose or typical use in urban settings.