Zurich to Basel to Bern

As the route develops to the south of Olten heading towards Bern, some distance further on, 4 tracks run alongside the river.
The centre 2 tracks dip down and curve left into the hillside and start to climb in a tunnel.


The outer 2 tracks come together and follow the river before they also turn to the left and climb up a short side valley. As they approach the top of the valley the other 2 tracks emerge from the tunnel, cross overhead, and disappear into another tunnel.


After turning right the outer tracks meet up with the centre tracks as they emerge from the second tunnel, and they then proceed onward only a short distance apart.


I am glad that there are maps to follow, as I could not have made this scene up.

Garry