Comment by al_borland

I read an article a while back that they made Waymo more aggressive, in the ways you mention, because they were quite annoying to other drivers when following the letter of the law. There is something to be said for following the flow of traffic.

I would imagine they would be able to revert back to more strict rule following once autonomous vehicles reach some level of critical mass and human drivers are needing to adapt to the AV traffic, rather than AVs needing to adapt to human traffic.