Why Do American Locomotives Idle All Night, But European Ones Get Shut Down?

American diesel locomotives idle through the night because shutting them down creates mechanical and operational problems that European railroads largely don't face — and the difference reveals two entirely different railroad operating philosophies shaped by geography, climate, and network design. American Class I freight locomotives operate in temperature extremes from the Montana Rockies to the Louisiana delta, where cold-weather shutdowns risk fuel gelling, coolant freezing, and lubrication failures in engines worth over a million dollars. European passenger locomotives operate on electrified networks, in milder climates, with shorter idle periods between scheduled service windows. Anti-idling regulations have pushed American railroads toward automatic engine stop-start systems — but on a network the size of America's, the idle never fully stops.