ARTICLE: "Phones studied as attack detector: U.S. Says cells could warn of toxic agents," by Mimi Hall, USA Today, 4-6 May 2007, p. 1A.

Not pie in the sky whatsoever. Already being done to track and manage traffic.

Fears of privacy?

What if you could get warnings from your cells on all these dangers?

Or peer-to-peer warnings from others?

Worth it to you then?