Availability of electric buses is far beyond 90 percent, he says, and thus must be considered good. Nevertheless, the mothballing of diesel vehicles has been delayed, as they still cannot be replaced one-to-one. Over the long term, Lottmann is basing his calculations on a ratio of 1.25 to 1.5 e-buses to diesels. “But when I arrive here in the morning and every e-bus is on the road, I always say that it can’t be going that badly,” he says, happily. The control centre, manned by two employees round the clock, apparently needs a lot more attention these days: more vehicles and drivers have to be exchanged and longer range buffers must be included.