How does the following distance change with the length of the bus?

The correct answer is based on the understanding that a longer bus requires greater following distance due to its size and dynamics. As the length of the bus increases, the stopping distance also increases, which means the driver must maintain a larger buffer zone when following other vehicles to ensure adequate reaction time and avoid accidents.

Larger vehicles have larger blind spots and a longer braking distance, which complicates the ability to stop quickly in an emergency. By increasing the following distance, the driver allows for more time to react to sudden stops or obstacles in the road.

The other options imply static or subjective adjustments to following distance, which do not account for the practical realities of vehicle dynamics. It’s important for drivers to adjust following distances based on their vehicle’s length and overall handling characteristics, as the safety of passengers and other road users relies on this awareness and proactive approach.