This week we’re expanding our traffic layer to cover all U.S. highways and arterials when data is available. We’re able to do this thanks in no small part to the data contributed by our users. This is exactly the kind of technology that we love at Google because it’s so easy for a single person to help out, but can be incredibly powerful when a lot of people use it together.
Official Google Blog: The bright side of sitting in traffic: Crowdsourcing road congestion data
