I remember Google maps working well for walking around in Europe. Ever since I've moved to America, not so much. Go figure...
Google isn't making arbitrary decisions here - it's reflecting social norms. Americans aren't big on walking. I've seen pictures of beautiful leafy suburbs that don't even have sidewalks.
I remember the time when roundabouts were round in Google Maps.
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This is in Ireland. I’ve also noticed it doing very silly things in Germany and the UK.
It’s fine for pure walking directions, but it gets unhappy about the idea of someone using public transport walking.