When programming an AV to drive like a human does, are the programmers including all the contextual human judgement that goes along with the human decisions, or

When programming an AV to drive like a human does, are the programmers including all the contextual human judgement that goes along with the human decisions, or just throwing away the letter of the law because it's too much trouble? I have a hard time explaining to a human teenager the etiquette that goes along with something like merging onto a highway, and it varies by region.