Which statement describes why a tractor-trailer may use part of your lane during a turn?

• A. To maintain its speed in the center of its own lane.
• B. To complete the turn by using part of your lane.
• C. To force you to slow down.
• D. To stop in the intersection.

Answer: (B)

When a tractor-trailer turns, the vehicle needs extra room because of its length and how the trailer tracks behind the tractor. To complete the turn safely, the driver may move into a portion of the adjacent lane. This swing into another lane is a normal part of turning a long vehicle and helps the trailer clear the curb and fit the corner. So the statement that describes why this happens is that the truck uses part of your lane to finish the turn. You should give the truck space and not try to squeeze by on the inside or expect it to stay entirely within its own lane. The other options don’t reflect why a big truck might encroach into your lane during a turn.