Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Flashing aspect sequence
#1
The attached sequence chart and layout extract from a real job some years ago may prove useful reference


Attached Files
.pdf   Severn Tunnel flashing aspects.pdf (Size: 440.77 KB / Downloads: 258)
PJW
Reply
#2
(29-07-2010, 08:17 PM)PJW Wrote: The attached sequence chart and layout extract from a real job some years ago may prove useful reference

sir,

thanks for this help

with regards
sarvesh kumar
Reply
#3
Hi,

I am unable to trace the Signal with flashing aspect in the attached PDF. Can someone help me with that... Please

Thanks & Regards
Reply
#4
Well spotted- you've got me on that one- neither can I!
I am just wondering, seeing as it is a black and white scan, whether what I have done is carelessly include the Green version rather than the Red!
Hene it is the boxed area that would have been being changed and for that route become MAY rather than MAR. I'll dig out my physical copy (assuming that I have still kept it rather than chucked it) and if so will post that version. At least it proves that someone occasionally looks at this stuff, thinks about it and is brave enough to challenge. The rest of you can share my shame!


(09-12-2012, 11:33 AM)jenni.joseph9 Wrote: Hi,

I am unable to trace the Signal with flashing aspect in the attached PDF. Can someone help me with that... Please

Thanks & Regards
PJW
Reply
#5
Hi,

I dont mean to Point out the issue.. I was just searching for Flashing Yellow and Flashing green aspects.

I have studied the Flashing Yellow aspects in standards but could not find out Flashing green. Can some one help me with that, please.

I have seen this Flashing green aspect on Main line for Freight trains.

Thanks & Regards
Reply
#6
Very happy that ayone does point out any error.

Flashing greens are rare, that used when a line signalled for say 125mph is used for 140mph trains which need an additional section in which to brake. I thought that really just used experimentally for trials, but may be wrong. Rather surprised re use for freight trains- however I no longer work on such railways and may not be completely up to date wih all standards, so perhaps the use has been extended to other circumstances of which I am unaware making an effective 5 aspect signalling system with the sequence G-FG-YY-Y-R where certain trains treat the FG as if it were a G whereas others with longer braking (either because they are fast or because they have worse braking) need to treat as a caution; however this seems such a change that I would have felt that I would have heard of something that substantial.

(12-12-2012, 08:04 AM)jenni.joseph9 Wrote: Hi,

I dont mean to Point out the issue.. I was just searching for Flashing Yellow and Flashing green aspects.

I have studied the Flashing Yellow aspects in standards but could not find out Flashing green. Can some one help me with that, please.

I have seen this Flashing green aspect on Main line for Freight trains.

Thanks & Regards
PJW
Reply


Forum Jump:


Users browsing this thread: 5 Guest(s)