> ”The answer, in short, is “P.S.R.” — or precision-scheduled railroading. P.S.R. is an operational strategy that aims to minimize the ratio between railroads’ operating costs and their revenues through various cost-cutting and (ostensibly) efficiency-increasing measures. The basic idea is to transport more freight using fewer workers and railcars.” That’s a long-winded way of saying: ‘We’d rather make more money tha…
From wikipedia:
Precision railroading or precision scheduled railroading (PSR) is a concept in freight railroad operations pioneered by E. Hunter Harrison in 1993, and adopted by nearly every North American Class I railroad. It shifts the focus from older practices, such as unit trains, hub and spoke operations and individual car switching at hump yards, to emphasize point-to-point freight car movements on simplified routing networks. Under PSR, freight trains operate on fixed schedules, much like passenger trains, instead of being dispatched whenever a sufficient number of loaded cars are available. In the past, intermodal trains and general merchandise trains operated separately; under PSR they are combined as needed, typically with distributed power. Inventories of freight cars and locomotives are reduced and fewer workers are employed for a given level of traffic. The result is often substantial improvement in railroad operating ratios, and other financial and operating metrics; at the cost of less-reliable service, particularly to smaller customers, long-term capacity issues, increased derailments and other safety risks associated with longer trains, and crew fatigue.
PSR is the reason why half of the US rail fleet is in storage, they are no longer needed. this has significant positive and negative benefits. On the positive side, this includes the environmental impact, on the negative side, it makes US rail systems totally unusable for anyone other then the freight railroads.
Freight railroads (and rail in general) remains one of the most regulated business out there, but the rail companies are aggressively pushing back on new regulations that would address significant problems.