Recent content by _Henry_

Great - many thanks that is helpful!

Hi @martin2345uk - thanks for that. But can I confirm something, you mention "In tunnels they are just the same as outside the tunnels." But surely the signs have to be different in tunnels? If they were the same signs, on a post in the walkway in the tunnel, wouldn't they block people from...

Thanks @TFN. That is very useful and RailSigns.uk has provided a nice photograph of a kilometarge marker which is nice and simple (see screenshot below from their website). Do you know what they do in tunnels? Do they stick the plate flat onto the tunnel wall (so you can't really see it from a...

Hello All, I am curious about the HS1 route and its signs. In particular, I am thinking about modelling a section of tunnel and wanted to print out some of the signs used. Does HS1 use the same signs like everywhere else on Network Rail? (I know HS1 is separate from Network Rail and obviously...

Hello everyone, I know there is lots of bullhead track on the London Underground - because I often see it when I take the tube and look down at the track. As I see so much of it on the London Underground I guess that it must be stressed because surely the London Underground wouldn't want to...

Hello, I am a bit confused about IBJs. I thought for a track circuit to work, you must have IBJs at either end of the track circuit and on both rails. Surely, if you don't do this then the track circuit would always be shorted? However, I have heard that on overhead electrification lines, you...

Many thanks for your replies. This is very interesting. Would the PLOD also be shown on a signal panel in a signal box? (My logic is that the PLOD must be connected or hard wired into the signalling system for it to work and therefore the signaller should be able to see it on their signal panel?)

Signalling and Lock Out Devices I just want to ask how a signaller or track worker knows if an area has a Lock-out device installed? Is it shown somehow in the Sectional Appendix, in a 5-mile diagram or in a signal box on the signal panel (or equivalent)? I found this photo from UniPart rail of...

Many thanks @68000 and @Nottingham59. I couldn't manage to find it yet but I am still searching! Also, I found this useful website which provides a good selection of BR Permanent Way Notes https://www.norgrove.me.uk/permanent_way_notes.htm but does not include all of them including the one I'm...

Does anyone know how to find the old British Railway's "Permanent Way Notes". I've been having a look online but can't find them - are they available in a library somewhere? In particular, following my posts on buffer stops which then led into a discussion of sand drags I was just trying to find...

Many thanks - the video is very interesting. It's really fascinating to see the tube train push the sand out the way. Most interestingly of all, it seems to show, after the first wheels, all the sand has been pushed out of the way and the rail is actually clean for all the following wheels!

Hi Edwin - thanks for your reply. But I don't understand why British Rail couldn't just build a really long sand drag - as long as it is long enough then surely it will do the job? I note from the British Rail Research Report they would need to reduce the height of sand to below 100mm so the...

Many thanks for your replies!

Apologies for posting such a basic question on the forum - I usually limit myself to infrastructure and pway topics! Later, I'm travelling from Birmingham New Street to London Euston on an 11-carriage Class 390 Pendolino (here's the realitmestrains link...

Interestingly, I found British Rail actually did research into sand drags for the ARP in the 1970s. It was called "Arrester Beds on Test Track TM-FT-025 (1975)" and is available for free on the RSSB website here: www.rssb.co.uk/spark/sparkitem/pb008795. In their report, they say they tested a...