Yesturday, I posted another thread for Y-shape turnout in Canada. Here, let me put another topic for CROR (canada) signaling system. According to CROR rule, staggered two-heads signal and single-head signal are permissive signal, excepting some cases. (E.g., when a A-plaque is attached below the signle-head, it becomes absolute signal. )
Th next three photos samely show that these permissive signals are located at turnout. Probably, these signals will not be interlocking signal. So, the turnout may not be protected by these signals. This is not normal in general signaling system. I want to know where and why these signal setup is possible, in general.
At Ashcroft you are looking at an industrial siding, and the switch is hand operated. It is protected by the signal since by the switch stand you will notice a “switch circuit controller”. As soon as the switch is moved from the main track the signal will turn red. When proceeding at a permissive signal the train is required to travel at restricted speed, able to stop clear of any obstruction in half the range of vision. In other words, that signal is protecting the entire block, and in this case the turnout just happens to be nearby.
Both pictures on the Galt Sub are in ABS territory,
Thanks for your clear and helpful comments. I could understand those.
At Ashcroft you are looking at an industrial siding, and the switch is hand operated. It is protected by the signal since by the switch stand you will notice a “switch circuit controller”. As soon as the switch is moved from the main track the signal will turn red. When proceeding at a permissive signal the train
As you say, there is a different between Ashcroft’s photo and the other two photos. In the former photo, the signle-head signal located hidden behind the staggered two-heads signal facing to us is located after the turnout. The location was strange for me. It suggests that the turnout is loosely (or not) linked to the signaling system. But, I could not guess that it is an industrial siding. I thought that the staggered two-heads signal may show “Slow to Clear”. However, your comment means “Slow to Clear” is not shown there.
Both pictures on the Galt Sub are in ABS territory, so the trains are moving using MBS clearances and the signals just provide an additional level of safety. The switches will be turned by hand in the field.
When I learned CROR rule, I could not understand why staggered two-heads signal can show “Slow to Clear” which is a diverging signal aspect, nevertheless it is a permissive signal. Your comment is a clear answer for me and greatly helpful to develop my CROR signaling system for modelrailroad.