The article is very similar to the bestseller "The Long Emergency," which chronicles the slow, downward spiral to zero petroleum: no more air travel, no more trucking, etc. Cities crumble, infrastructures melt-down, crime and lawlessness rises and life as we know it today ceases to exist.
The author goes on to hypothesize that the US will slowly be forced to return to a more agrarian style of country not unlike life around the turn of the 20th century, where we relied on horses, farming and skilled trades (shoemaker, carpenter, etc) to survive. None of us will venture too far from home anymore, except for some train travel as there will still be enough coal to power locomotives. The author suggests securing rural property near a rail head to prepare for the new reality of no oil and no gasoline.
Scary stuff, no doubt, for a society that's taken plentiful and generally cheap gasoline for granted for decades. Hopefully I won't live to see it.