In brief: To make air in the city cleaner, London’s bus fleet operator is in the process of electrifying its buses. Soon it will operate one of the city’s bus lines on all electric power. The tried-and-trusted AxTrax AVE electric portal axle from ZF is making a big difference for zero local emission drives in London’s rolling landmark, the double-decker bus. To mitigate climate change, other major cities around the world are also electrifying their public transit buses – whether it's by using modern electric buses or the innovative retrofit sets soon to be produced by ZF with a cooperation partner.