As reported here, and basically confirmed by Elon on twitter, Autosteer's use is now restricted to the speed limit on some roads in some situations (results vary). Some are OK with this some are not. The biggest issue seems to be when the vehicle "thinks" the speed limit is 5 or 10 miles below the actual speed limit, causing the vehicle to quickly reduce speed creating a potential safety issue and in general just being annoying. I've heard all kinds of ways Tesla is supposed to be determining the speed limit but it seems that they are not able to do this consistently. Just how are they supposed to accomplish this? I'd like to focus on how to implement this change, rather than whether or not it should even be happening, as that has been discussed ad nauseum, but there's allways one (or 10, or 20).