On the LIRR and other railroads, if any, that still operate under the SCOR, "Yard Limits" are only found on Single Track where Rule 251 is in effect. It makes no difference what Block Signal system is in use on that track. You won't find them on track where Rule 261 is in effect and Manual Block rules, like Y to PD, the Far Rock and Long Beach branches. Nor will you find them on multiple track portions of the LIRR even if Rule 251 is in effect.
The creation of Yard Limits was a way for the railroad to not have to issue a Train Order Form G (S-G on the LIRR since it is only used on Single Track) to an Extra desiring to occupy the Main. It does not in any way dispense with Superiority or Block Signal protection. You would still have to apply Rules S-83 and represent Superior trains and S-87, clearing Superior trains times by not less than five minutes.
A practical application on the LIRR would be this:
You are an Extra desiring to occupy the main within Yard Limits. You would obtain permission or signal indication for your authority to occupy the main as an Extra, in lieu of a Train Order Form S-G. You check your timetable to see what Superior trains were opposing you for the previous 12hrs. You ascertain that those Superior trains for the preceding 12hrs have arrived in the area you are to enter the main, either by Clearence Card Form A that is timed after the most recent arrival and states that all trains due have arrived or with a Train Order (S-83). While checking your timetable, you make sure there are no other Superior opposing trains due shortly so that you are not occupying the main less than five minutes of that train being due in the area you are to occupy the main. Last, since Block Rules are in effect, you obtain the condition of the Block and your ready to go.
You only concern yourself with opposing trains, because, Rule 251 is in effect. Once you got Block Signal indication, that signal indication would supercede any superiority a train may have over you that is operating in the same direction as your Extra is to run. If we had to make a move in a pinch, and a superior was due shortly, we would name our train in such a way that we would technically be proceeding in the same direction as him and not worry about the five minute rule since the Block signal superceded his superiority over us. Or if there were annullments, to lighten up the paperwork, we would name our train so that it was proceeding in the same direction as the annulled trains eliminating the need to get any information on them.
It's real easy and fun to do when you are doing it because it is all that you learned and you are seeing the application of it. To sum up "what are Yard Limits"? It is a form of authority for Extra trains to occupy the main on certain parts of the railroad the same way a Regular train has a schedule as its form of authority. Every train needs "authority" to occupy the main, so its just one of many ways, that's all.
The creation of Yard Limits was a way for the railroad to not have to issue a Train Order Form G (S-G on the LIRR since it is only used on Single Track) to an Extra desiring to occupy the Main. It does not in any way dispense with Superiority or Block Signal protection. You would still have to apply Rules S-83 and represent Superior trains and S-87, clearing Superior trains times by not less than five minutes.
A practical application on the LIRR would be this:
You are an Extra desiring to occupy the main within Yard Limits. You would obtain permission or signal indication for your authority to occupy the main as an Extra, in lieu of a Train Order Form S-G. You check your timetable to see what Superior trains were opposing you for the previous 12hrs. You ascertain that those Superior trains for the preceding 12hrs have arrived in the area you are to enter the main, either by Clearence Card Form A that is timed after the most recent arrival and states that all trains due have arrived or with a Train Order (S-83). While checking your timetable, you make sure there are no other Superior opposing trains due shortly so that you are not occupying the main less than five minutes of that train being due in the area you are to occupy the main. Last, since Block Rules are in effect, you obtain the condition of the Block and your ready to go.
You only concern yourself with opposing trains, because, Rule 251 is in effect. Once you got Block Signal indication, that signal indication would supercede any superiority a train may have over you that is operating in the same direction as your Extra is to run. If we had to make a move in a pinch, and a superior was due shortly, we would name our train in such a way that we would technically be proceeding in the same direction as him and not worry about the five minute rule since the Block signal superceded his superiority over us. Or if there were annullments, to lighten up the paperwork, we would name our train so that it was proceeding in the same direction as the annulled trains eliminating the need to get any information on them.
It's real easy and fun to do when you are doing it because it is all that you learned and you are seeing the application of it. To sum up "what are Yard Limits"? It is a form of authority for Extra trains to occupy the main on certain parts of the railroad the same way a Regular train has a schedule as its form of authority. Every train needs "authority" to occupy the main, so its just one of many ways, that's all.
