Comment Re:The map one was prickish. (Score 1) 1440
Because numerous studies have demonstrated that conversing with someone on the phone, even hands free, demands far more of a person's attention than conversing with someone in the car with you. Under controlled test track conditions drivers holding phone conversations made significantly more driving errors than those conversing with people in the car. The prevailing theory is that when talking on the phone your brain is forced to focus much more intently on the content of the conversation than when talking to a person sitting right next to you.