Transport for London (TfL) and railway company Siemens Mobility have unveiled the new Piccadilly line train designs, which will come into operation from 2025 and will consume 20% less energy than the existing fleet from the 1970s. Siemens says that overall energy consumption will be reduced by 20% compared to the current fleet. Relevant features include lighter-weight construction and regenerative braking. Another technological advancement are the “cutting-edge traction systems” which use low-loss magnet motors and auxiliary electric systems, according to Siemens.