With the last update to Google Maps on the iPhone they added a new feature for traffic conditions. I originally thought these were based on estimates or general traffic conditions in that area but I now believe the traffic conditions on Google Maps is actually live.
I was on the Fahaheel Expressway heading south earlier today using Google Maps for navigation and there was traffic just before the 6th Ring Road bridge. Turns out there had been an accident and debris was spread out all over the highway causing congestion. To my surprise the traffic was showing on Google Maps. No idea how they’re getting the traffic data but I’m going to be using Google Maps a lot more now when trying to figure out which road has less traffic.