43303_43058
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Does anyone know what the red aspect in a hand lamp/on a baton means?
Red in combination with something else can mean go though - you're allowed to pass red signals at caution if the "cats eyes" are illuminated, e.g. for a shunt move or permissive working (attaching/double docking).Anything that's red on the railway is always stop.
Which makes super bright cycle tail lamps on a dark platform a fun experience.
Are you thinking of those with a white, not red, "pivot" lamp - i.e. a red/white horizontal 'on' indication and a white/white diagonal 'off' indication?Similarly, some old shunt signals keep the bottom right aspect red when they clear, just having the one white aspect, rather than two as happens on new ininstallations.
Red in combination with something else can mean go though - you're allowed to pass red signals at caution if the "cats eyes" are illuminated, e.g. for a shunt move or permissive working (attaching/double docking).
Similarly, some old shunt signals keep the bottom right aspect red when they clear, just having the one white aspect, rather than two as happens on new installations.
I also don't believe there ever was a red/white proceed aspect in a shunt signal. Originally they just had three white lights but at some stage (many years ago) the one that was lit only for danger was changed to a red one. More recently the pivot light (which is always illuminated) was changed to a bi-colour light.Erm, no. Passing a signal showing a subsidiary aspect is NOT passing a red signal at caution, it's passing a proceed signal showing a proceed aspect.
I'd agree with @Tomnick about the shunt signals, there are red/white shunt signals that clear to white/white, although they are few and far between now. Can't think of a red/white proceed aspect.
Not sure I agree with this statement. A Position Light showing a proceed aspect (two whites at a diagonal) authorises the driver to proceed, the main aspect to which it accompanies is not relevant. It is not 'authorising' the passing of a danger aspect, whether at caution or not.Red in combination with something else can mean go though
Could you technically say you aren't passing a signal at danger?Not sure I agree with this statement. A Position Light showing a proceed aspect (two whites at a diagonal) authorises the driver to proceed, the main aspect that it accommanies is not relevant. It is not 'authorising' the passing of a danger aspect, whether at caution or not.
That's a matter of semantics. It's still red in combination with something else; I was refuting the claim that red is "always" stop.Not sure I agree with this statement. A Position Light showing a proceed aspect (two whites at a diagonal) authorises the driver to proceed, the main aspect that it accommanies is not relevant. It is not 'authorising' the passing of a danger aspect, whether at caution or not.
Could you technically say you aren't passing a signal at danger?
Could you technically say you aren't passing a signal at danger?
That's a matter of semantics. It's still red in combination with something else; I was refuting the claim that red is "always" stop.
Goodness me, some people do get worked up over this kind of stuff! It's not as if anyone will be learning their rules from a forumYour argument is void. Find another example where red does not mean stop.
Your argument is void. Find another example where red does not mean stop.
Your argument is void. Find another example where red does not mean stop.
They still can be.The old Bardic lamps from BR days could be used as an emergency tail light
The main aspect is relevant. It indicates the section ahead may be occupied. You can only proceed as far as the shunt signal allowsNot sure I agree with this statement. A Position Light showing a proceed aspect (two whites at a diagonal) authorises the driver to proceed, the main aspect to which it accompanies is not relevant. It is not 'authorising' the passing of a danger aspect, whether at caution or not.
A red semaphore signal arm inclined at 45 degrees is an unequivocal "proceed" indication.Anything that's red on the railway is always stop.
Or a NSE lamp postAnything that's red on the railway is always stop.
A GPL alone also means the same thing generally speaking. If proceeding on an associated position light you’re proceeding the same as you would with the authority of any other GPL. The main aspect being red doesn’t really tell us anything new.The main aspect is relevant. It indicates the section ahead may be occupied. You can only proceed as far as the shunt signal allows
I fully understand what both signals mean. I was explicitly highlighting that the earlier post, which stated that the main aspect being red didn’t mean stop, was wrong, as it misunderstood the relationship between the main aspect and PL.The main aspect is relevant. It indicates the section ahead may be occupied. You can only proceed as far as the shunt signal allows