How to Google Maps calculate your ETA? [Solved]

Like in similar products, Google maps ETAs are based on a variety of things, depending on the data available in a particular area. These things range from official speed limits and recommended speeds, likely speeds derived from road types, historical average speed data over certain time periods (sometimes just averages, sometimes at particular times of day), actual travel times from previous users, and real-time traffic information. They mix data from whichever sources they have, and come up with the best prediction they can make.

Most companies who do live traffic compare their predictions against actual time in traffic to tune their algorithms and data sources. The likely result of this is that the companies who have access to the best usage data (ie those who are best able to compare their predictions against reality, which means those who have the most usage) are likely to end up with the best predictions in the medium to long term.

However, don't expect the best predictions to be accurate any time soon. Calculating ETAs is a future-prediction problem, and traffic, while it follows certain patterns, is inherently unpredictable. Even if you had complete knowledge of current traffic conditions and known changes (eg roadworks starting or a football match finishing), there's nothing that can predict a crash or a slow truck changing route.

Another way to Google Maps calculate your ETA?

Google tracks the real time location of all the mobiles traveling in a route and analyze the location changes with time. Google analyze all these date very precisely by using artificial intelligence technology then determines that how fast or how slow the traffic is moving in that particular route and divides them into 3 category

  • Blue- Less/Nil Traffic (Fast Movement)
  • Yellow- Average traffic (slow/medium speed Movement)
  • Red- Huge traffic/Traffic jam (Very slow/No movement)

Apart from that it also takes the data from some satellite sources wherever possible.

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