This service provides the same functionality as Google Maps service. But real- time vessel traffic shown on the 3D map of Google Earth plugin with use of 3D ships models. You can get ... In other systems, this period is usually 60-90 seconds.
On the other hand, almost everyone who uses Google Maps cares about traffic. Just being able to see "there's a lot of traffic along that route at that time" is not acceptable - it has to give you a guess on the time - and I suspect most people providing that answer realize this.
We know how Google Maps plots much of the real time traffic.
So what I understand, Google pulls out outlier data caused by accidents or other issues and does some basic statistics to formulate a good prediction based on the live traffic data they collect on a daily basis.
Google collects its mapping data from a wide variety of sources including road sensors, user contributions via Map Maker, and local transport departments, among several others. Hidden away in Google Maps settings is the option to view traffic data for any location in real time.
When we combine your speed with the speed of other phones on the road, across thousands of phones moving around a city at any given time, we can get a pretty good picture of live traffic conditions. We continuously combine this data and send it back to you for free in the Google Maps traffic layers.