Reply #51: And in addition to the missing visual cues, there's the sound quality.

[politicat]

A conversation with a person on a land line or in a moving car has a better sound quality, no matter what the cell phone companies want us to believe. The signal degrades just enough that the brain has to put extra energy into decrypting the conversation, and that makes it harder to drive and talk at the same time.

I notice that people who listen to audiobooks or have long conversations in the car don't have nearly the problems that cell drivers have.