How it started
History
Prior to the December 2021 timetable the company, under the name DB ZugBus Regionalverkehr Alb-Bodensee, operated various regional rail services in Baden-Württemberg in addition to bus services. DB Regio restructured the company, with the rail services transferred to DB Regio Baden-Württemberg.
From Wikipedia’s article on DB ZugBus Regionalverkehr Alb-Bodensee, shared under CC BY-SA 4.0.2