Probably more than you’d expect. It has to do with pensions (which are very generous). Due to how pension benefits vest (by years worked, not hours), the railr

Probably more than you’d expect. It has to do with pensions (which are very generous). Due to how pension benefits vest (by years worked, not hours), the railroad would rather have 0.5x workers working for 2x hours. Railroads also save money if they can burn out workers (and have them leave voluntarily) before they fully vest.