We often hear about the improvement of controllability, but what does it mean? Controllability is best illustrated with the following:

1. The steering wheel becomes heavier.
2. Better road feedback, in other words what we call a clear sense of road.
3. Improvement on the roll when turning, in other words the improvement of under-steering causing the barycenter to lean outwards, or the over-steering causing the barycentre to lean inwards.
4. The roll of high speed lane changing is improved as well. Therefore the improvement of controllability means that the car operates more stable and thus safer, whilst allowing the driver to experience the best driving experience, even when taking a turn.