text: Another problem is that holding a phone in your hand physically impedes on the mobility of the driver. In every driver's manual it distinctly states that every driver should place both hands on the steering wheel. If you don't have both hands on the steering wheel,you are much more likely to be unprepared for the fast decisions you will have to make as there is much less traction on the steering wheel. This also forces you to make a greater effort in order to move the steering wheel.