What does the 'no zone' refer to in relation to large trucks?

The 'no zone' refers to the areas immediately surrounding large trucks where visibility is significantly reduced for the truck driver. These zones are particularly dangerous as smaller vehicles may not be seen by the truck driver, leading to potential collisions. Large trucks have large blind spots on all four sides, which is why understanding these zones is critical for safety. Drivers of smaller vehicles must be aware of these areas to avoid driving too close to trucks, especially when changing lanes or merging. Recognizing and respecting the 'no zone' helps in promoting safer driving practices around large vehicles.