In connection with the standard Dynamic Cruise Control (DCC), "dynamic" means that the preselected speed is kept at a constant level when riding downhill. Suppose the engine's braking effect is not sufficient. In that case, the fully integral brake is automatically activated to maintain the desired riding speed. Active Cruise Control (ACC), available as an optional extra, goes one step further. Thanks to radar sensor technology, it enables relaxed gliding with distance control – and there is no need for the rider to adapt road speed to the vehicle in front. As with all cruise control, it is not safe to relax totally and rely on technology. Simon at Vines pointed out that riders must still be aware that the traffic in that lane will be slower than the set speed when changing back to a left-hand lane. So never switch the best technology off, your brain.