There are a lot of people who are using Traffic Apps these days, as well as using next generation GPS units that have connected traffic capabilities. We're not talking about the old TMC traffic that gives you a blunt look at what's on the road, and barely a warning where traffic is turning bad. We're talking down to the quarter mile, primary and secondary roads look at traffic speed versus regular speed limits.
Inrix comes to mind as a leading provider, but TomTom has also used their installed base of smartphone users to learn of traffic issues. Not only do they gather raw data from their installed base of users on smartphones, but they also assemble data from fixed sensors, and road coils to learn the actual speeds.
Here's a great contest going on in the UK; Nestle has recreated a Willy Wonka-like Golden Ticket type promotion where once you open a winning bar, their team will find you and hand you a 10,000 GBP check. The winning bars has a GPS chip and a transceiver in them, which activates when you open the winning candy bar.