Comment by kataklasm

The German metro area "Rheinland" has a population of 8.7 million people across 12 thousand square kilometers. ~700/sqkm vs the 240/sqkm population density of Atlanta metro. Train and metro travel in this metrk area is extremely convenient and fast. It's not that Atlanta (or anywhere else in the United States for that matter) couldn't do it because of vastness, there's just no political and societal will behind this idea. In a society that glamorizes everyone driving the biggest trucks and carrying the largest rifles, of course convenient train systems are "not feasible".