What is the benefit of using cruise control in a commercial vehicle?

Using cruise control in a commercial vehicle primarily contributes to improved fuel efficiency during long-distance driving. When set correctly, cruise control maintains a steady speed, which minimizes unnecessary acceleration and braking. This steadiness allows the engine to run more efficiently, reducing fuel consumption compared to constant manual adjustments.

While increased driver alertness is important, cruise control itself does not directly increase alertness; in fact, drivers still need to remain attentive to the road. Enhanced vehicle handling is not guaranteed as cruise control does not adapt to all driving conditions, particularly challenging ones such as heavy traffic or adverse weather. Additionally, while cruise control allows for less manual input, it does not provide the capability to drive entirely without control, as the driver must remain engaged and ready to take over at any moment.

Therefore, the primary benefit recognized in the context of long-distance driving is indeed the enhancement of fuel efficiency.