![Ask MR: What were the Big Four railroads? - Trains](https://static.politico.com/70/f3/31350fa440a3abaa7137fef20895/earns-norfolk-southern-73926.jpg)
Palpable fear': D.C.'s newest rail safety push faces a tough opponent - POLITICO
![Ask MR: What were the Big Four railroads? - Trains](https://i.ytimg.com/vi/-jc1A1zJoC4/sddefault.jpg)
Transcontinental Railroad & the Big Four
![Ask MR: What were the Big Four railroads? - Trains](https://images.newrepublic.com/fd41fa949671570ab2fec841b6cd457fb5255b98.jpeg)
Rail Workers Tried to Warn Us the Ohio Train Derailment Would Happen
![Ask MR: What were the Big Four railroads? - Trains](https://i.natgeofe.com/n/e12e8590-048b-4856-9dff-7897711d199f/60041_4x3.jpg)
China Advances High-Speed Rail Amid Safety, Corruption Concerns
![Ask MR: What were the Big Four railroads? - Trains](https://assets.editorial.aetnd.com/uploads/2019/02/locomotive-v-horse_feature_gettyimages-517443636.jpg)
When a Horse Raced Against a Locomotive During the Industrial Revolution
![Ask MR: What were the Big Four railroads? - Trains](https://upload.wikimedia.org/wikipedia/commons/thumb/5/57/Cornelius_Vanderbilt_Daguerrotype2.jpg/1200px-Cornelius_Vanderbilt_Daguerrotype2.jpg)
Cornelius Vanderbilt - Wikipedia
![Ask MR: What were the Big Four railroads? - Trains](https://www.pbs.org/wgbh/americanexperience/media/canonical_images/film/Transcontinental_Horizontal_2800x1576_TY.jpg)
Watch The Transcontinental Railroad, American Experience, Official Site
![Ask MR: What were the Big Four railroads? - Trains](https://media-cldnry.s-nbcnews.com/image/upload/rockcms/2022-07/220713-norfolk-southern-freight-train-mn-1615-00498b.jpg)
A rail strike could be hitting freight routes. Here's why workers are angry.
![Ask MR: What were the Big Four railroads? - Trains](https://www.telegraph.co.uk/content/dam/Travel/2017/January/col%201.jpg?imwidth=680)
On board the railroad that tamed the Wild West
Railroad industry sues to block new locomotive pollution rules in California
![Ask MR: What were the Big Four railroads? - Trains](https://therealnews.com/wp-content/uploads/2022/08/GettyImages-1408430463-scaled.jpg)
Ask a railroad worker: How did railroad jobs get so bad?