long heavy trains: cause of several train wrecks

At 34:00 of this video:https://www.youtube.com/watch?v=QMU--_Rhm-0&t=2016s ........... ‘The longer the train, the heavier the train’ — Ohio disaster calls attention to freight’s growing bulk The sheer length of the 150-car train that went off the rails Feb. 3 \ By Tanya Snyder Updated: 02/16/2023 The toxic train derailment in East Palestine, Ohio, is drawing new attention to the dangers of increasingly long freight trains — part of a series of cost-savings efforts by freight railroads that have drawn scrutiny from the industry’s critics.“One hundred fifty cars is a really, really significant [number of cars],” said Sarah Feinberg, who dealt with multiple oil-train disasters and a fatal Amtrak derailment as leader of the Federal Railroad Administration under Barack Obama. “For years, the FRA and other safety regulators have raised concerns about trains of that size. In a 2019 study, the Government Accountability Office said 150 cars is more than twice the average length of freight trains operated by major railroads from 2008 through 2017. The GAO found that average freight train lengths had increased by 25 percent since 2008, and noted that some stretch to nearly three miles long. The freight rail industry’s main trade group dismissed concerns about length….. The NTSB final report on a 2017 derailment {in Pennsylvania faulted the use of hand brakes and the arrangement of freight cars in that (curve) accident involving a 178-car train, which also released hazardous chemicals. 33 rail cars on CSX Transportation, Inc. (CSX) train Q38831 derailed in Hyndman Borough, Bedford County, Pennsylvania. The train consisted of 5 locomotives and a total of 178 cars (128 loaded and 50 empty, 46!! in the front), including derailed cars 53 through 65.} https://www.cnn.com/2023/02/23/us/ohio-train-derailment-east-palestine-thursday/index.html ………..