If you're asking why Autopilot wanted to drive through barriers in the first place, I believe the path planner knows it needs to make a right turn and looks at the neural network output to "select the best path that goes right" (as opposed to the highest predicted path likely going straight). As
you recorded:
View attachment 629509
and
others have recorded:
View attachment 629510
The predicted path can happily
ignore other predictions such as barriers, road edges or medians/islands:
View attachment 629514
Where in this last example, the path planner wants something going straight, and the neural network not having trained enough on intersections with intersection islands ends up falling back to what it knows of "well, going straight through an intersection path generally looks like this" even if the path goes right through a separately predicted median. Autopilot engineers long term probably want to train the network to predict a curving path around the island as the most likely path for straight, but in the short term, I wouldn't be surprised if FSD beta worked around the issue by having the logic be "select the best path that goes straight -- but ignore those that go through medians."
If you're asking how FSD beta 10 could improve even without a full firmware update, which could include neural network and path selection logic updates… Some have speculated that map updates could happen between firmware updates, and those generally require being on WiFi to download. One type of map update could be to indicate there are no turn lanes to the smaller Randolph Street segment from
Green Street thus trying to have navigation and path planner avoid selecting a turn at the first intersection.
However, even with that type of map update, it's up to the neural network perception to predict which lanes are associated to which intersections, so that could be why it's not 100% success. Indeed according to the map data, there are 3 intersections in close proximity that are all "Randolph & Green," and the barriers make the predictions less confident.
So similar to the potential short term fix of ignoring paths through medians, there could be a firmware update to avoid paths through temporary barriers (assuming those are existing neural network predictions and/or those would need to be trained to better accuracy). Higher level, this probably is a whole set of "what to do with construction and road closures" that would also affect how navigation selects what routes to take, and maybe Tesla has decided this is something to address after a wide release.