Talk:Absolute block signalling

Unwarrented editing
Last night I edited this page to improve the knowledge contained within, all of which was correct and all of it could be found either in TS1 or TS3 of the current rule book. Why have my contributions been eradicated? 86.143.249.105 (talk) 12:05, 24 July 2008 (UTC)


 * The history of the page is here - I assume 86.4.212.210 was your address? The only other recent edits are typo fixing and nothing has been deleted. BTW, if you sign up for account you can keep track of your contributions much better. Wongm (talk) 23:55, 24 July 2008 (UTC)

Yes that was me on another computer, I will create a user-id in time. 86.143.249.105 (talk) 16:42, 25 July 2008 (UTC)

Sections and station limits
I have edited some of this section to include recognised definitions and added a short section on intermediate block sections and intermediate block home signals. 86.4.212.210 (talk) 18:21, 23 July 2008 (UTC)

Bell codes
The bell codes listed are significantly wrong compared to their usuage today, however, nothing suggests this page is exlusively a current defination of Absolute Block. Should they be today's bell codes? If not it should be made clear they are historical and examples only. —Preceding unsigned comment added by 172.200.6.37 (talk) 21:20, 2 March 2008 (UTC)

Bell codes updated to modern usage, but is (currently) not exhaustive for supplementary codes, although classification of trains should be complete.--92.4.29.237 (talk) 09:03, 3 May 2008 (UTC)

I have altered some of the definitions of the bell codes to what is given in the rule book and added in a few more. I will add in others at a later date. 86.4.212.210 (talk) 18:00, 23 July 2008 (UTC)

I have edited the example given of a train being signalled from Signalbox A to Signalbox B. When A sends 'train entering section' he does not need to send 'call attention' first. 'Train entering section' is one of about 8 bell codes where 'call attention' does not need to be sent and acknowledged first before sending a bell code. 86.143.249.105 (talk) 16:43, 25 July 2008 (UTC)

Portsmouth Harbour
As mentioned here, during the (ever-lengthening) time of the Portsmouth resignalling work, the temporarily reopened Portsmouth Harbour box is working Absolute Block to Fratton. 86.132.141.168 02:16, 17 June 2007 (UTC)

Hi i dont know how to edit the main article but it would be good if someone could put 2-1-2 in as obstruction removed as this was a June change to the rule book. —Preceding unsigned comment added by 62.6.149.18 (talk) 08:14, 21 October 2008 (UTC)

Structure of page
I wonder if the layout of the page needs to be beefed up to enable a lay person to understand the purpose and functioning of the absolute block system?

Afterbrunel 18:32, 24 June 2007 (UTC)

Train running away
The following block bell signals have been left out:


 * (Emergency) Train running away on right line.
 * Say, Train may have passed starting signal at red down the down line.
 * (Emergency) Train running away on wrong line.
 * Say, Train broken in two and rear half rolling back down the up line.

Tabletop (talk) 02:04, 19 November 2010 (UTC)

What is "Absolute"?
Neither this article nor Signalling block system makes clear what it is that is absolute in this form of block signalling. If there is to be a sensible dividing line and minimal overlap between the two articles, it would be helpful to make this clear. --TedColes (talk) 08:50, 24 August 2021 (UTC)