At some point since v8, I've noticed that the navigation screen sometimes has green (and occasionally red) lines on roads. Is there any documentation for this? I searched the forums, but didn't find anything. I haven't spent much time trying to figure it out, but it seems that the red designates traffic (I don't encounter a lot of traffic, but the few places I saw red were on the side of traffic lights where traffic stops). Green would presumably mean that traffic isn't detected. The green lines show on roads that I haven't traveled on, so presumably this is from data gathered from cars. There are lots of side roads that it doesn't include, and I have noticed breaks in the lines. I'm suspecting that the green lines only appear in places Teslas have driven (not including other cars, which would rule out data from other companies), where Tesla knows AP can be enabled. Could this perhaps be related to v8 using radar, and fleet learning (e.g. Tesla's comment about v8 that "If several cars drive safely past a given radar object, whether Autopilot is turned on or off, then that object is added to the geocoded whitelist.”)? Was this there before, and I just didn't notice?