Ontario Trucking Practice Exam

When rounding a right curve on a highway with a tractor-trailer, keeping the front wheels to the left side of the lane is essential for safe navigation. This position helps ensure that the long rear end of the trailer does not swing into the adjacent lane or off the road. Tractor-trailers are longer than standard vehicles, and as they navigate curves, the trailer can angle in a way that makes it susceptible to swinging wide.

Maintaining the front wheels to the left side of the lane allows for a smoother and safer turn by minimizing the risk of the trailer extending beyond the boundaries of the lane or potentially colliding with any obstacles or other vehicles on the right side. It also enables better visibility for the driver, allowing them to better assess the road ahead and any incoming traffic.

In contrast, moving to the center of the lane may not provide the necessary room for the rear of the trailer and can lead to instabilities or difficulties in maintaining control during the turn. Keeping the back wheels to the right side of the lane might result in the trailer hitting the curb or another obstacle. Slowing down before approaching the curve is a prudent practice, but maintaining the correct lane position while turning is crucial for safely navigating the curve with a wide vehicle like a tractor