![David Zalubowski FILE - A maintenance worker walks past the company logo on the side of a locomotive in the Union Pacific Railroad fueling yard in north Denver, Oct. 18, 2006. Four railroads, including Union Pacific, have asked federal appeals courts to throw out a new rule that would require two-person train crews in most circumstances. (AP Photo/David Zalubowski, File)](https://mapi.associatedpress.com/v2/items/bf9766c95754464fba4849ef65123ac0/preview/preview.jpg?s=680x)
FILE - A maintenance worker walks past the company logo on the side of a locomotive in the Union Pacific Railroad fueling yard in north Denver, Oct. 18, 2006. Four railroads, including Union Pacific, have asked federal appeals courts to throw out a new rule that would require two-person train crews in most circumstances. (AP Photo/David Zalubowski, File)
![Lm Otero FILE - A worker rides a rail car at a BNSF rail crossing in Saginaw, Texas, Sept. 14, 2022. Four railroads, including BNSF, have asked federal appeals courts to throw out a new rule that would require two-person train crews in most circumstances. (AP Photo/LM Otero, File)](https://mapi.associatedpress.com/v2/items/0124e24c7bb147f6aaf5d68177830c22/preview/preview.jpg?s=680x)
FILE - A worker rides a rail car at a BNSF rail crossing in Saginaw, Texas, Sept. 14, 2022. Four railroads, including BNSF, have asked federal appeals courts to throw out a new rule that would require two-person train crews in most circumstances. (AP Photo/LM Otero, File)