One would need to know more details. Yields in particular is one area where, under many conditions, you have to expect drivers to do reasonable things. Of course, you don't expect a driver to just blow through a yield sign. But maybe the driver with the right of way slows down a bit or changes lanes to let someone in or because they see someone edging out into traffic.

During the behind-the-wheel test, I slowed down toward the 4-way junction in which I had the right of way.

The examiner marked it as a minor mistake; He told me that I could get rear end for that. I didn't argue with him as he was the examiner. But I'd prefer 10 rear ends over one t-bone.

When implementing a self-driving car, I'm not sure if we can explicitly write code that is against the DMV guidelines. For example, human seems to slow down at the junction even with the right of way and drive 5mph over the speed limit.