What is a significant risk factor when following large vehicles?

Following large vehicles poses a significant risk factor because other drivers may not see them clearly. Large vehicles, such as trucks or buses, can create substantial blind spots, which means that their drivers might not be aware of smaller vehicles or motorcycles in close proximity. This can increase the risk of collisions if those smaller vehicles attempt to change lanes or overtake without being visible to the larger vehicle's driver. Additionally, the height and width of large vehicles can obscure the view of other drivers, making it more challenging to gauge speed and distance accurately.

While the other factors mentioned can contribute to driving risks, they do not capture the primary concern of visibility, which is crucial for road safety and preventing accidents. The ability to see and be seen on the road is vital, and it becomes even more complicated in the context of large vehicles.