Looking at a map of the area, it's an extra-wide lane, as described in the report. Why would CA build it that way, instead of a full turn lane? I assume since it's technically a single lane, the fault actually lies with the bus, since it was attempting to pass within the lane?
Thanks for that. It's so obvious from that view, but harder to understand from the bird's eye view.
So from the bus driver's perspective, the AV was a parked car on the side of the road. From the AV's perspective, it likely should have treated the situation as if it was going from a parked position to merging into traffic.
That storm drain is way too close to the intersection to be a legal parking area according to the rules of the cities I'm familiar with. It's close enough that I would typically assume a stopped car signalling a right turn is waiting for pedestrians to clear out of the crosswalks. I wouldn't expect a car in the AV's place to swerve left, but I would definitely be looking at it as active traffic, not a parked car.
https://www.google.com/maps/place/El+Camino+Real+%26+Castro+...