I tried to skim the whole thing and I still haven't seen whether the article actually answers the question ("why"). Also, what does "destination" mean in the c

I tried to skim the whole thing and I still haven't seen whether the article actually answers the question ("why"). Also, what does "destination" mean in the context of the commute? The workplace, or does it mean home in the evening? Is he talking about people living in the city and working outside or the other way around?