Bumpy roads are the bane of touch sensitive interfaces. Without any doubt, a driver will spend more time and attention trying to operate a touch sensitive inte

Bumpy roads are the bane of touch sensitive interfaces. Without any doubt, a driver will spend more time and attention trying to operate a touch sensitive interface than a physical knob or button if the car is bouncing or shaking at all due to road surface irregularities. Not all roads are smooth highways (and some highways are in a horrible state of repair), so managing car systems without physical controls is almost as dangerous as operating a mobile phone.