I understand that Google Maps works out travel times based on the speed limit for the road and the current traffic on the road. (When selecting the driving function).

When using the cycling/walking function, I assume it works out the travel times by using the average walking pace(~3mph) and the average cycling pace.(~9.6mph)

But does it increase the time if your journey includes a lot of upwards hills, as you would obviously be travelling slower if walking or cycling? And does it decrease the time when there are lots of downwards hills, as you would be travelling quicker (maybe not by foot but definitely on bike)?