How Google Maps show Traffic on Roads, Routes? The data is aggregated from several sources, including road sensors, as well as car and taxi fleets.
Google Maps can now predict traffic information for any day of the week and time of the day, based on past conditions. By default, if you click on the Traffic button in a supported area from the US...
Google has just added the ability to see traffic estimates by day and time for not just highways but also for many roads. Google announced this on the Google Maps blog saying
Google Traffic is a feature on Google Maps which displays traffic conditions in real time on major roads and highways in over 50 countries. Google Traffic can be viewed at the Google Maps website, or by using the Google Maps application on a handheld device.
Google Maps dynamically re-routes based on real-time traffic information, and even suggests which lane to be in.
Google maps recently added the possibility of doing exactly this! I noticed it for the first time today. When you query the route for a specific destination a new option shows up above the possible routes...
Google Maps bases its traffic views and faster-route recommendations on two different kinds of information...
Google Maps has just rolled out an exciting new traffic feature, that provides traffic data for major interstates and freeways.
On top of this library, the tool itself has the ability to perform traffic analysis of Google Maps sessions running over an HTTPS connection.
@Anto's answer, for example, points to Google's Maps For Work as a paid API service that allows you to get travel times taking traffic into consideration.