The system - tested here in Audi's RS5 Sportback allows a driver to set a speed, and the vehicle will then use a combination of cameras and sensors to ensure a gap is maintained to the vehicle in front.
Audi RS5 Sportback
That gap can be adjusted to suit driving conditions, while more sophisticated systems like the one in the RS5 can actually manage the stop/start of a typical peak hour commute without the driver's intervention.
READ MORE Audi RS5 Sportback review
Of course, none of these systems is a substitute for aware and alert driving, but it's a great idea to at least know how the systems in your car work. After all, you paid for them!
In the video, we show how adaptive cruise control works on a highway, as well as how the adaptive cruise operates in a city. Not all cars have adaptive cruise control, of course, so be aware of what kind of cruise control you have before giving it a try in traffic.