The NYC Dept of Transportation is introducing  OCT 17 2007

The NYC Dept of Transportation is introducing compass decals to be placed on sidewalks at subway exits to help orient disembarking passengers. I thought I'd posted a link about this idea before on kottke.org, but the only reference I can find is a discussion about compasses on manhole covers. (thx, erik)

Update: Aha, here's the entry. John has more.