In 1920, the U.S. railroad network was still near its peak. There were over 250,000 miles of track being used by over 1,000 railroads. Over 1.5 million men and women were employed in the industry.
By 2020, the number of railroads in the U.S. was down to about 700. However, the vast majority of the 700 are short line railroads; there are only seven Class I railroads operating (and that will drop to six when the Kansas City Southern Railway is acquired). The miles of railroad track in use has...