>>1597468nature of self a regulating free market
it is a mathematical equation, cost of maintenance vs repairs / payout in the event of an accident.
Track maintenance could be 1-2 million or more a mile, which will eat into profits (returns to share holders and bonuses for CEO / board).
Accidents are insurable and will be placed on the crew (exceeding the speed limit, too fast for conditions, failure to report hazards, ect).
if the company is found liable and gets sued, they will hold it up in court long enough for the CEO and share holders to flip their stock.