First chance to try it out today. Very, very cool!
GPS vs camera: It's apparently both. I watched it tell me there was a stop sign coming up, before it was in view (so, database); and it's correctly displaying the color of the traffic lights (camera). What I was really surprised by: I did some testing in a mostly empty mall parking lot. It was correctly identifying & stopping for not only stop signs in the lot (but not on a public road, and just "gray space" on the moving map), but also painted "STOP" lines at the end of rows (no actual stop sign, and certainly not in a db).
Speed limit: In auto-steer, it insists on the speed limit. The auto-stopping works the same in traffic-aware cruise control, though--and the speed is not so tightly limited.
Stopping after the fact: contrary to what the vid posted by @
Nirmaljal (
post #20) seemed to show, I watched it stop after I told it to go on a green for a yellow that popped up right afterward. Totally unplanned, I wasn't expecting it to change: approaching the intersection, green light, no traffic or other hazards in the intersection, pulled the stalk as soon as the notice popped up--then, a moment later, the light changed and the car started braking. Cool!!
The hardest part of this is, as others have noted, remembering to "do something" when approaching a green light and it's clear sailing. I'm having a ball playing with this latest update...!