September 17 – The first of the 6000-seriesrapid transit cars (6001–6720), are placed in service on the Chicago "L" system. built by the St. Louis Car Company of St. Louis, Missouri, the number of these cars would eventually reach 720, dominating the CTA's fleet for decades. The first batch is placed in service on the Logan Square route.
September 30 – Tasmanian Government Railways introduces X class into service, the first mainline diesel-electric locomotives purchased by an Australian government railway system.