On a divided highway with four or more lanes in one direction, in which lane may large trucks be driven besides the right traffic lane?

• A. In the right traffic lane only
• B. In the lane to the left of the far-right
• C. In the far-left lane
• D. In any lane as long as safe

Answer: (B)

On a divided highway with four or more lanes in one direction, large trucks should stay in the right-side lanes to keep faster traffic in the left lanes free to pass. They’re also allowed to use the lane immediately to the left of the far-right lane when needed, such as to maintain space or prepare for a lane change, but not in the far-left lane as a normal operating practice.

So the lane just to the left of the far-right lane is the one trucks may use besides the right traffic lane. The far-right lane is typically for slower-moving traffic, and the far-left lane is reserved for faster traffic and passing, so trucks don’t belong there as a normal rule. The idea is to prevent trucks from blocking the left lanes and to keep traffic flowing safely.