text: Back on the topic a multitasking, the repeated shifting of attention from one thing to another. This shifting of attention is not even the full 100% attention. In the case of driving, no one never not wants 100% of their attention on the road while piloting a two-ton metal beast. According to the article Multitasking: Switching Cost by the American Psychology Association, "although switch costs may be relatively small, sometimes just a few tenths of a second per switch, they can add up to large amounts when people switch repeatedly back and forth between tasks". Going back to the previous paragraph, those couple feet in which a driver is not fully aware of the road around them is incredibly dangerous, and now adding other drivers also not fully aware, that's not a pretty sight.