eli5 How does google maps show traffic congestion in real time? (and other related questions)

Question

1. Do they use satellite images?
2. are there other services that do the same thing?
3. How do they get the data about public transits?

In: Technology

Answer 1

Yeah mate, I’m guessing it’s an algorithm for the calculations, like 1 slow phone is a walker but a series of phones going fast then slowing down at the same point is congestion. I believe if your location data is on Google maps uses it (if you have the permission allowed)