How does gps estimated arrival time

I did something similar in school myself. You can also weight by raw distance, or by estimated fuel consumption if those are more important, e. You can weight by monetary cost, e. In my experience it usually starts off with a rather conservative estimate, such that on clear roads you can usually shave off 7 or 8 minutes per hour.

If I plug in the traffic data receiver, however, the ETA tends to be rather unreliable as it will suddenly add on 90 minutes to the journey time because of a traffic jam on the route, that usually turns out not to exist…. My TomTom recalculates the time on the fly, as well. I like to look at the time estimate and guess what time I will actually reach my destination.

My Garmin seems a bit problematic on the ETA issue. In CS, what do you call this type of problem? It uses posted speed limits on the roads that you will be traveling on. Easy peasy. It expects that you will go those limits.

Simple math. The data in the system is pretty damn good. Me too. I spend a couple of hours shaving 15 minutes off of my arrival time and then the wife or daughter needs to stop to use the restroom. The point is that stopping for an extended period, for whatever reason, does not seem to update the ETA in a reasonable fashion.

So maybe the question is, how long does your speed need to be zero, or very near it, for the ETA to take that into account? Even if it pays no attention to instantaneous speed. Bad time to raise the issue. The recent solar flare may be causing problems with GPS.

They mix data from whichever sources they have, and come up with the best prediction they can make. Russell went on to explain that navigation providers constantly compare their estimates to actual historical travel time in various traffic conditions to fine-tune their algorithms.

Zach Epstein has worked in and around ICT for more than 15 years, first in marketing and business development with two private telcos, then as a writer and editor covering business news, consumer electronics and telecommunications. Magazine's top Internet of Things experts. You may also prefer to avoid certain types of routes, such as toll roads, ferries, or routes with carpool lanes. Exclude a particular road type to have the system calculate a route that avoids these roads whenever possible.

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