Why should you stay out of the open space to the right of a tractor-trailer truck?

Staying out of the open space to the right of a tractor-trailer truck is essential because trucks make wide right turns. When a large truck turns right, it often needs to swing wide to navigate the turn, which can encroach upon the space to its right. If a vehicle is positioned in that area, it risks being in a dangerous situation where it could be struck by the trailer as the truck turns.

This is particularly important because the driver of a truck may have limited visibility, and they may not be aware of smaller vehicles that are too close to the side of the rig. Therefore, to ensure safety, it's crucial for other drivers to avoid this space during a truck's turning maneuver.

While trucks may indeed have blind spots that can affect their ability to see smaller vehicles, the primary concern with the open space to the right is the turning radius. Similarly, the option regarding designations or legality pertains less directly to the immediate safety implications involved with large vehicles navigating turns. Thus, understanding the dynamics of how large trucks turn informs safer driving practices around them.