> This resulted in a lot of finicky behavior - things like your sim not taking the subway to work because he had to walk back a single block to catch it, and insisting on joining the gridlock instead.

Reminds me a lot of most consumer GPS today that avoids backtracking whenever possible, even if that means a more congested or convoluted route.

I've seen this behavior too many times, from systems ranging from Google Nav to TomTom to the OEM Nav in my Mercedes.