Events January events January – London Underground diagram designed by Harry Beck introduced to public. January 1 – The Southern Railway's Southern Belle, a Pullman train running between London and Brighton, England, is re-equipped with electric multiple unit cars to replace steam power. January 23 – San Diego and Arizona Railway's bypass around tunnel 7, which was destroyed by fire, opens. January 31–April 7 – A strike disrupts rail transport in Northern Ireland. The Castlederg and Victoria Bridge Tramway ceases operation permanently. February events February 1 – The San Diego and Arizona Eastern Railway is incorporated and assumes all operations of the San Diego and Arizona Railway. February 24 – Sanin Line, Kyoto via Toyooka, Yonago, East Hagi to Hatabu of Shimonoseki route officially completed in Japan. April events April 11 – The Great Western Railway initiates an air service between Cardiff and Plymouth (Great Britain), using Westland Wessex aircraft chartered from Imperial Airways. May events May 2 – Samuel T. Bledsoe succeeds William Benson Storey as president of Atchison, Topeka and Santa Fe Railway. May 15 – Deutsche Reichsbahn-Gesellschaft puts the Fliegender Hamburger Multiple unit into service. It shortens the distance of between Hamburg and Berlin Lehrter Bahnhof to 138 minutes. The average speed was . May 20 – A first section of Osaka Municipal Subway, Umeda to Shinsaibashi, part of Midosuji Line route officially completed in Japan. June events June 15 – The last scheduled train run on the narrow gauge Wiscasset, Waterville and Farmington Railway ends with a derailment in Whitefield, Maine. June 25 – Canadian Pacific Railway discontinues the use of the Imperial Limited name, although the trains continue to run designated now by train numbers only. June 29 – Portland–Lewiston Interurban ends regular service on its line in Maine. July events July 15 – The Atlantic City Railroad changes its name to Pennsylvania-Reading Seashore Lines. July 22 – The Maine Central Railroad ends train service to the Mount Kineo House destination hotel on Moosehead Lake. August events August 15 – The first broadcast of the passing “Pan American” on radio station WSM. This will become a daily feature, popularizing “train” rhythms in country music, a Hank Williams song and making celebrities out of the Louisville & Nashville crews. September events September 30 – Chicago South Shore and South Bend Railroad enters receivership; Samuel Insull is forced out of the railroad's presidency. October events October 11