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Appendix  Use of proceed aspect 6

Rhätische Bahn - brake signal at Solis

System L and System N mixed

• System N block signal announces System L entry signal
• System N signal announces System L distant signal
• System L distant signal announces System N block signal

It is not intended to replace system L signals unless in case of new or reconstructed installations. So system L and system N will coexist for a long period of time. This results in some interesting combinations where system N signals announce system L signals (and vice versa).

System N block signal announces System L entry signal

Here new block sections with system N signals have been installad whereas the adjacing station has kept its interlocking and its system L signals.

System N signal announces System L distant signal

First of all this sounds curious but it makes sense. On parts of the Rhône valley line the speed limit has been increased from 140 km/h to 160 km/h. Thus the distance between distant and main signals became insufficient. Instead of shifting the existing distant signals, additional system N signals have been installed. In their normal position they show ''speed announcment 140 km/h''.

As far as I know this was the first application of system N signals at all!

In the above example a train may pass the signal »84NE« with 160 km/h then has to reduce speed to 140 km/h before reaching the entry distant signal »84E*« in order to be able to carry out its warning aspect in time.

System L distant signal announces System N block signal

I'm not quite sure if there is such a signalling. But if my memory doesn't play me a trick the following situation really exists:

Appendix  Use of proceed aspect 6

Rhätische Bahn - brake signal at Solis