Abstract: A gangway bellows is used as a cross-over shelter between two vehicles which are flexibly connected to each other. The sidewalls of the gangway bellows have a double-wall design. Each internal wall is constructed as a curtain, which is suspended at its upper end from the roof of the gangway bellows and ends with its lower end immediately above a crossover unit, between the vehicle sections, having a turntable. The inner walls cover the track groove and, between themselves and the side walls of the gangway bellows, form chambers in which service facilities can be accommodated. Each curtain is folded preferably to correspond to the gangway bellows. Support elements may be interposed between each curtain and the respective side wall of the bellows.