What is a key reason to stay below the posted speed limit while driving a commercial vehicle?

Staying below the posted speed limit while driving a commercial vehicle is primarily important for maintaining safety and control, especially given the size and weight of these vehicles. Commercial vehicles often carry heavier loads, which significantly affects their handling characteristics compared to standard passenger vehicles.

Driving at higher speeds can lead to a longer stopping distance, decreased maneuverability, and an increased risk of losing control, particularly in adverse weather conditions or tricky road situations. By adhering to or staying below the speed limit, drivers can ensure they have adequate reaction time to address any sudden obstacles or changes in traffic, thus enhancing overall road safety. Additionally, this approach allows for better management of the vehicle's momentum, particularly when navigating turns or downhill grades where speed can easily escalate, posing a risk to the driver and other road users.