If you can't see a large truck's two outside mirrors while following it, what does this indicate?

When you can't see a large truck's two outside mirrors while following it, this indicates that you are in the driver's blind spot. Large trucks have significant blind spots on their sides, front, and rear. If you cannot see the mirrors, it means that the truck driver likely cannot see you either, making it unsafe to be in that position.

It's essential to maintain awareness of your position relative to large vehicles, as they are more limited in visibility compared to standard passenger cars. Being in their blind spot can lead to dangerous situations, particularly when the truck needs to change lanes or make a turn.

The other options relate to speed and distance from the truck. While it's important to maintain a safe following distance and appropriate speed, those aspects do not directly address the visibility concern regarding the truck's mirrors. The focus here is on the visibility issue that arises specifically from being positioned in the blind spot of the truck.