I skimmed the article, but the only metric I saw mentioned was that "traffic jams were eliminated". What metrics do the hypothetical robocars improve?

I ask because time-to-destination is not the only metric I find myself caring about. I will often choose a much longer, scenic, route instead of the congested highway even though it adds 10 (estimated) minutes to my trip. But I'd rather be actively driving, moving through space and feeling like I'm making progress for an hour than sit in a barely moving queue for 50 minutes.