Why Railroads Refused to Shut Off Their Diesel Locomotives

Railroads left diesel locomotives running for hours when nobody needed them, and in northern winters some were never shut off at all. This is why, and what changed it: no antifreeze, batteries and air brakes, habit, neighbors and fuel bills, automatic start-stop, a fight in court, Lac-Megantic in 2013, and what still idles today. Yes, the narrator is AI. I'm a train fanatic with a voice that would clear a room, so I let a robot read it. Everything else is done by hand: every fact comes from the builders' manuals, the railroads' own words, government rules and reports, court rulings, patents and the railroad press, and I check every line before it goes up. No invented quotes, no made-up documents, no AI slop. Get something wrong and I'll fix it: tell me in the comments with a source. More from Locomotive Geek: How GE Broke EMD's Grip on American Locomotives    • How GE Broke EMD's Grip on American Locomo...   What Really Happened to Union Pacific's Tier 4 SD70s    • What Really Happened to Union Pacific's Ti...   Why Railroads Still Run 50-Year-Old Locomotives    • Why Railroads Still Run 50-Year-Old Locomo...   Locomotive Geek: The railroads, one story at a time. CHAPTERS 00:00 Never Shut Off 01:49 Left Running 04:03 No Antifreeze 05:49 Battery and Air 09:08 From Steam Heat to Idling 12:15 The Crew and the Habit 13:43 The Neighbors and the Bill 16:54 The Engine That Shuts Itself Off 22:09 The Rule They Fought 26:16 Lac-Megantic 31:09 Still Running SOURCES Electro-Motive and General Electric manuals (1941 to 2005); Railway Mechanical Engineer (1949); Railway Locomotives and Cars (1954 to 1960) EPA rules and reports (1998 to 2026); FRA rules (2001 to 2020); Canada, SOR/2017-121; Transportation Safety Board of Canada, Report R13D0054 (2014); AAR v. South Coast AQMD (9th Cir. 2010) Patents (1982 to 2001); Argonne, CSX and Maryland (2005), Maine DOT, NYSERDA, Amtrak's Inspector General; Union Pacific, BNSF, CSX, Norfolk Southern; Progressive Railroading (2001 to 2026) IMAGE CREDITS CC BY 2.0. jpmueller99: https://commons.wikimedia.org/?curid=... https://commons.wikimedia.org/?curid=... https://commons.wikimedia.org/?curid=... sodai gomi: https://commons.wikimedia.org/?curid=... https://commons.wikimedia.org/?curid=... kitmasterbloke: https://commons.wikimedia.org/?curid=... https://commons.wikimedia.org/?curid=... vxla: https://commons.wikimedia.org/?curid=... https://commons.wikimedia.org/?curid=... Greg Gjerdingen: https://commons.wikimedia.org/?curid=... https://commons.wikimedia.org/?curid=... Drew Jacksich: https://commons.wikimedia.org/?curid=... Tyler Silvest: https://commons.wikimedia.org/?curid=... Jay Cross: https://commons.wikimedia.org/?curid=... Franklin Campbell: https://commons.wikimedia.org/?curid=... Roy Luck: https://commons.wikimedia.org/?curid=... David Wilson: https://commons.wikimedia.org/?curid=... Patrick Feller: https://commons.wikimedia.org/?curid=... CC BY 2.5. Tyler Silvest: https://commons.wikimedia.org/?curid=... CC BY 3.0. Scott A. Miller: https://commons.wikimedia.org/?curid=... CC BY 4.0. 4300streetcar (own work): https://commons.wikimedia.org/?curid=... https://commons.wikimedia.org/?curid=... https://commons.wikimedia.org/?curid=... https://commons.wikimedia.org/?curid=... Pokemonprime: https://commons.wikimedia.org/?curid=... Shown whole, with no text on it. CC BY-SA 3.0. Bouchecl: https://commons.wikimedia.org/?curid=... Public domain or CC0: Roger Puta (slide scanned and posted by Marty Bernard, Flickr account 'railfan 44'), Jack Delano (Library of Congress), Carol M. Highsmith, US EPA, GR_Pei, Charles O'Rear and Jack Corn (EPA Documerica), Railfan 124, Tracks_Rails (Flickr account 197409220@N06), G Pei (Flickr account 197409220@N06), Zeroxysm, Feddacheenee, YamahaFreak, Alex Lloyd (US Air Force). Film: The Big Train (New York Central, 1950s), A Great Railroad at Work (New Haven, 1942), This Is My Railroad (Southern Pacific, 1940s), Mainline U.S.A. (Association of American Railroads, 1957), Prelinger Archives Photos are cropped, panned or zoomed, and some have text added. Thumbnails are crops of photos credited here, with text added.