The Zug reversing loop, which made it possible to run from both directions into the station, was also built at that time.

There have been two tracks between Kollermülle station and the branch to the Zug loop since the opening of the line, but these were used separately, that is one was used for services to/from Affoltern and the other to/from Rotkreuz.

Only the operation of passenger trains running towards the Gotthard fell away between Kollermühle and Rotkreuz.

Most freight trains from Zürich to Rotkreuz continued to run via the rail triangle.

When it was decided to transfer the former shunting yard on the approach to Zürich Hauptbahnhof to Zürich Mülligen (only fast goods and postal traffic) and to Limmattal marshalling yard, it was clear that this traffic would be eliminated.

For this reason, on 19 November 1970, the side of the rail triangle that connected Steinhausen with Cham was closed and dismantled.