Understanding how Maps navigation works

I found a fascinating video detailing how Google Maps predicts traffic congestion and calculates optimal detour routes.

Enjoy.

It is now new but a great reminder.

Super helpful breakdown, especially regarding how rerouting handles sudden traffic changes! I always wondered how quickly it recalculates behind the scenes. Thanks for sharing this deep dive.

The theory is simple but in practice there must be other elements at play, as even after years and years of development, all navigation services for drivers fails us quite frequently (At least in the UK, on long established roads and without good reason). I think the recalculation of the data and sending it your way, may be at fault because (to me) it makes no sense why is it so frequently wrong.

How many times do you see traffic jam indication when there are no cars on the road?

How many times do you get into traffic jam without warning?

And worst, when there is a traffic jam, how many times you found the alternative route even worst. I personally rarely take an offered route on country lanes instead of traffic jams on motorway.

We somehow got used to living with it but (at least for me) the levelmof trust in traffic data is limited.

Anyone of our LGs is a cab or truck driver and can convince me these services actually work really well?