Over which period the best route is calculated without current traffic

Over which period the best route (travel distance and time) is calculated if current traffic is not taken into account. Is that an average from the last weeks, months or other timeschedule?

When I calculate a route on tuesday 9AM, without the current traffic, I get a response that seems to take the ‘normal’ traffic into account that’s present on tuesdays around 9AM. But how many tuesdays are taking into account? And if there are changes in the road, when will the calculation dismiss the old situation and only use the new situation in the calculations?

I hope someone can enlighten me (and my customers).
Thanks

It is an average of last few months.

“And if there are changes in the road, when will the calculation dismiss the old situation and only use the new situation in the calculations?” - as this calculation is an average, the best solution would be to calculate route with departAt=now and traffic=true.