Semi tractor cruise control systems are typically engaged by a switch or button on the steering wheel or dashboard. Once the desired speed is set, the driver can simply release the accelerator and the vehicle will maintain that speed. The cruise control can be disengaged by pressing the brake pedal or by pressing the cruise control switch again.
Some semi tractors also have adaptive cruise control, which uses radar or other sensors to maintain a safe following distance from other vehicles. This can be especially useful in heavy traffic or when visibility is poor.
Cruise control can be a valuable tool for semi truck drivers, helping to reduce fatigue and improve fuel efficiency.