The researchers at Stanford come through again. This time with research that will help keep people attentive to their driving if they should be talking on their cell phones. The researchers found that people will become more attentive if the direction of the sound changes. Specifically, people would pay more attention to a sound at the same level as their ears, if that sound moved down, the people learned that there was something needing their attention. Of course, this means the car has to be able to sense that traffic conditions require the attention of the driver!