The SOB Traverso, designated RABe 526, is a passenger articulated trainset manufactured by Stadler Rail for Südostbahn, a railway company in Switzerland.

Südostbahn employs the Traversos on long-distance routes such as the Voralpen-Express and the Treno Gottardo [de] services over the traditional Gotthard railway.

Under an agreement with Swiss Federal Railways, SOB would assume the operation of these services with the December 2020 timetable change.

The trains were painted in a copper livery that according to SOB symbolized "the historical development of human society.

"[6] The Treno Gottardo trains, operating from Basel SBB and Zürich HB to Locarno, commenced in December 2020.