"Traffic jams are ubiquitous in human society where individuals are pursuing their own personal objective," Perhaps humans don't have the option of walking / d

"Traffic jams are ubiquitous in human society where individuals are pursuing their own personal objective," Perhaps humans don't have the option of walking / driving through wherever they please, and instead they have to use fixed roads / sidewalk? I'm pretty sure if we had the option of driving on dirt we would easily avoid traffic jams, as we'd just drive wherever we want.