May 22 – In the Quintinshill rail crash, four trains including a troop train collide, the accident and ensuing fire causing 226 fatalities and injuring 246 people at Quintinshill, Gretna Green, Scotland; the accident is blamed on negligence by the signalmen during a shift change at a busy junction.[4][5]
September 11 – The Pennsylvania Railroad begins electrified commuter rail service between Paoli and Philadelphia, using overhead AC trolley wires for power.
November 6 – The Delaware, Lackawanna and Western Railroad's Tunkhannock Viaduct, with 10 arches totalling 2,375 ft (724 m) in length and 240 ft (73.15 m) from creekbed forming the world's largest reinforced concrete structure at this date, is officially opened.
First Russian locomotive class Ye2-10-0s built in North America. By the end of World War II, more than three thousand will have been built to the same basic design.
^Smith, Cecil J. (2006). "This day in Monon history". Monon Railroad Historical-Technical Society. Archived from the original on August 4, 2012. Retrieved March 15, 2007.
^Joy, David (2012). Engines that Bend: narrow gauge articulated locomotives. Southend: Atlantic Publishers. p. 20. ISBN978-1-902827-23-0.
