Google Maps Adds Live Traffic Data

Here's something real cool. Google Maps, in both the desktop and mobile versions, now offers live traffic data for over 30 cities. Just call up a map and then click the Traffic button; major roads now appear as green (smooth), yellow (busy), or red (congested). You can even overly the traffic data on the satellite and hybrid views. And on interstate highways, you get the green/yellow/red separately for lanes in both directions! I find this especially useful when I'm on the go, and can check Google Maps via Google Mobile on my cell phone.