The completion of the transcontinental railroad in 1869 was not the only amazing feat of American railroad engineering in history. In 1886, railways in the south managed to convert the gauge on an estimated 11,500 miles of track in a period of just 36 hours. The History Guy remembers the 1886 Southern Railroad Gauge Change, an important moment in railroad history. The Day The Gauge Changed | 10:05 The History Guy: History Deserves to Be Remembered | 1.61M subscribers | 1,173,812 views | June 16, 2018