[OSRM-talk] how exactly is "duration" in route service calculated?

[Günther S]

Hi there,
I would like to know how the "duration" is calculated exactly.What is the data basis for this calculation?- predefined speed per segment (where to get that speed)?- is real traffic information somehow considered?
For instance:this request returns 1037.9sec = 17.3 minhttp://router.project-osrm.org/route/v1/driving/5.39952890748535,52.1960411446193;5.4446426827156,52.1682341727178?overview=false


on the other hand, google calculates 7min for the fastest route:https://www.google.at/maps/dir/52.1682341727178+5.4446426827156/52.1960411,5.3995289/@52.1889039,5.387444,14z/data=!3m1!4b1!4m7!4m6!1m3!2m2!1d5.4446427!2d52.1682342!1m0!3e0?hl=en

thanks,Guenther
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