What is the greatest danger when following a bus or larger vehicle?

The greatest danger when following a bus or larger vehicle is reduced visibility. When you are behind a large vehicle, your line of sight can be significantly obstructed, making it difficult to see the road ahead, as well as any potential hazards like pedestrians, cyclists, or sudden stops from the vehicle in front. Large vehicles can block traffic signals or important roadway signage, leading to a higher risk of accidents.

While other concerns, such as the other vehicle stopping suddenly, do exist, the primary risk from following closely behind large vehicles is the limited visibility they pose. This can lead to delayed reactions to changing road conditions or obstacles, increasing the chances of collisions. Boredom and exhaust fumes are less relevant to safety in terms of immediate driving risk, while they may be discomforting, they do not present the same level of danger as the lack of visibility.