Divide the hourly cost of a human railroad engineer by the total value of the goods they transport by train. Then divide the hourly cost of a truck driver by t

Divide the hourly cost of a human railroad engineer by the total value of the goods they transport by train. Then divide the hourly cost of a truck driver by the total value of goods that can fit into a single truck. The latter ratio is orders greater, and that means there's a much higher economic incentive to replace the truck driver than there ever will be to replace railroad engineers. And I would wager this difference in incentives widens when the amount of damage done by inattentive truck drivers vs. inattentive engine drivers is taken under consideration. Besides, operators will probably desire a small crew to watch over their trains anyway for the foreseeable future, regardless of whether a human is in the pilot's seat.