ddkilzer
Member
Here's another reason to be extra cautious with the new "wide-lane" support in AP2 on 2018.10.4: Lane correction when the vehicle is literally about to split two lanes at highway speeds is extremely quick. It felt more like an avoidance maneuver—as if it wanted to complete the lane change before the lane divider actually started on the pavement. I had both hands on the steering wheel (as usual) when driving, and it was still surprising how rapidly Autosteer moved into the right lane.
This happened at the lane split on I-280 South headed for the I-880 North/US-17 South exit, just past the Winchester Blvd exit (images are copyright Google from from Google Street View; they were not taken by me, and they are not from today):
View attachment 291377
The Google Street View vehicle is one lane to the left—the lane to its right is the one that splits into two lanes. With 2018.10.4, the wide-lane support kept my Model X centered between the ever widening "lane" until maybe 30-50 feet (very rough estimate) before the new lane divider started, at which point Autosteer moved rapidly into the right-hand lane (I don't know why the right lane was chosen vs. the left lane in this case):
View attachment 291378
I don't have a dash cam, and I don't care to have the publicity that might come with posting a video, but I want folks to be aware of this behavior. I'm considering reporting this to Tesla since it happens so quickly—it's basically the opposite of a smooth lane change.
Just wanted to follow up to note that the behavior of 2018.12 is much improved at this location.
The MX moves to the right-hand lane well before the new center lane marker appears now, and it's much less jarring (if only because it's traveling a shorter distance).