Incomplete because of https://dialog.hochbahn.de/bus-in-zukunft/neue-brennstoffzel... and https://www.hochbahn.de/de/presse/pressemitteilungen/brennst... and https://www.ndr.de/nachrichten/hamburg/Hamburger-Hochbahn-st...

(jooze tränntzläyshun zörvizzäss!)

TL;DR: Hamburgs mobility provider is trying it again, after failure in 2019 with 5 Busses, with 5 Busses (Fuel-Cell) again, this time allegedly 'mass production ready'.

With the intent of max. 10% of the fleet based on this ¹, or similar, in 2030, which is their target for carbon neutrality.

Got a little bit more range, refuels faster (in 15 minutes), than the few hours E-Busses (currently) need.

Regarding infrastructure this has to be seen in the context of Hamburg wanting to be a hydrogen hub, because of its harbour, shipping, processing and such.

Shrug? We'll see...

¹ actually the Hamburger Hochbahn isn't the only provider, about the other half comes from VHH ( https://vhh-mobility.de ) which don't use or intend to use hydrogen, instead going for battery electric exclusively. Which in the context of 'Hydrogen Hub Hamburg' mentioned above, seems logical, because they operate lines far out of that also.

There's a few companies and labs in Germany who still manage to somehow sell hydrogen as a "local innovation" to government grants every now and then... Hydrogen busses, hydrogen trams, hydrogen trains. It never sticks, unsurprisingly.