 The short section between Piccadilly and Oxford Road stations was converted to 25 kV AC, and on 21 September 1960, suburban electric services from the Styal and Stockport lines began to use Oxford Road as their city terminus.By the late 1960s the Altrincham Electrics were approaching forty years of age.Rather than replace them with new rolling stock operating on the non-standard 1500 V DC system, the decision was made to withdraw the trains and convert the whole Altrincham line to 25 kV AC.