On 20 December 2021, Stadler started final assembly of the Tyne and Wear Metro’s first new train.
Since July 2020, Strabag and Swietelsky-Slovakia carried out the modernisation of the OŽ line (Ozubnicová železnica, Rack and pinion railway) in Vysoké Tatry. On 23 July 2021, the Special Construction Office of the Slovak Ministry of the Interior issued a permit for "early use of the line - for test runs".
On 29 November 2021, MÁV-START started a test passenger service on a new train-tram system in southern Hungary, connecting the cities of Szeged and Hódmezővásárhely by using the Szeged - Békéscsaba railway line as a train between them and in Szeged and Hódmezővásárhely working as a tramway, using the local tram lines.
On 25 November 2021, RhB had the pleasure of welcoming a special unit to Landquart: the Capricorn 3133, which includes the 500th bodyshell to be built for RhB from Altenrhein works.