The Stuttgart - Ulm line is known as the Filstalbahn and runs along the valley of the River Fils from Plochingen to Geislingen.
146.221 led RB 19219, the 08:31 from Stuttgart Hbf to Ulm Hbf, through one of the more rural sections of the valley, east of Gingen, on the morning of 4 May 2017.