Originally Posted by Artkansas

We teach it!

That's the importance of the feedback. If the system is smart enough to discriminate between residential streets and main thoroughfares, it's only a small leap to knowing about the shortcuts through parking lots. We just have to be on the ball and let the folks at Google know of all those bicycle only shortcuts and the sections of street that are deathzones.

Actually I was impressed that it routed me through that hilly section on the way back from work. It meanders but it's all residential. It's in Beta, so I'll forgive it a lot. I look forward to seeing how it improves.