Talk:Acton–Northolt line

Why the WP article began
When I started the article I included the following in its text in the vain hope that its mere appearing would spur others to improve my beginning; what happened was the message was almost immediately cut out as "it belongs in the talk page" but it was not moved there. "First editor's note. I became tired of hitting references in WP to this line without an article so I cobbled this together from WP and other online sources and hope some other editor can improve it. Online sources give differing dates and names and some display incomprehensible turgidity."

Editor Hertzsprung has asked for some sort of listing of those references. "Reference" meant mainly "mentions in WP", now with the article existing the little black or red "New North Main Line"s in WP are mostly blue. Unlike my bête noire hobby-horse, "Sutton and Mole Valley Lines", the NNML really exists. I might try Google for it both anywhere and in en.WP. More than that at the moment I forget.--SilasW (talk) 20:57, 30 March 2009 (UTC)

It's growing fast!--Wipsenade (talk) 17:27, 20 December 2010 (UTC)

It's upgraded now!--Wipsenade (talk) 14:50, 22 December 2010 (UTC)

Northolt waste compactor
I tweaked the map to label the NNML's end junctions, but have not found a location for the waste station, I think it is between junctions (flyovers?) at Northolt Junction and not on the through line as the map shows.--SilasW (talk) 14:06, 12 July 2009 (UTC)

It is but I thought the location was enough given the low level of detail on the diagram. It is on the isolated piece of land created by the flying junction at Northolt. The compactor is only there as a current source of traffic for the line after all. I will work on the junction if you feel it merits greater detail (or accuracy). Britmax (talk) 09:09, 13 July 2009 (UTC)

Fair enough. I went by there just once and my memory was that the waste plant might showable off the through line without the cat's cradle that some editors attempt.--SilasW (talk) 10:18, 13 July 2009 (UTC)

Singled, etc
This railway-speak needs to be explained. —Preceding unsigned comment added by 81.140.57.113 (talk) 14:44, 15 April 2010 (UTC)

Yep!--Wipsenade (talk) 17:26, 20 December 2010 (UTC)

Here are some railspeak turms for you!

 * A line or track lifted= Track removed either for maintenance or for ever if the line is closed for good.--Wipsenade (talk) 17:26, 20 December 2010 (UTC)
 * A line or track singled= All lines were removed except for 1.--Wipsenade (talk) 17:30, 20 December 2010 (UTC)
 * A line or track doubled= An extra line was added to the single line, creating 2.--Wipsenade (talk) 17:30, 20 December 2010 (UTC)
 * A line or track laid down= The track is put in place during repairs or on a new line before opening.--Wipsenade (talk) 17:30, 20 December 2010 (UTC)
 * Semaphore signalling= A mechanical signalling system run by a local signal box used before modern electric signals and signal centres were created.--Wipsenade (talk) 05:10, 22 December 2010 (UTC)
 * P-hut/P-way hut/Permanent way hut= A railway workers' line side shelter/tool shed.--Wipsenade (talk) 05:10, 22 December 2010 (UTC)
 * A line or track Reduced to freight= Only freight trains can now use a former passenger line.--Wipsenade (talk) 13:50, 22 December 2010 (UTC)
 * A line or track Raised to passengers= A freight line is opened up to passenger trains.--Wipsenade (talk) 13:50, 22 December 2010 (UTC)


 * A railway sleeper, railroad tie (US usage), or railway tie (Canadian usage) is a rectangular object used as a base for railroad tracks. Ties are members generally laid transverse to the rails, on which the rails are supported and fixed, to transfer the loads from rails to the ballast and subgrade, and to hold the rails to the correct gauge.


 * The Railway track on a railway (non-US) or railroad tracks (US), also known as the permanent way, is the structure consisting of the rails, fasteners, sleepers and ballast (or slab track), plus the underlying subgrade. For clarity it is often referred to as railway track (British English and UIC terminology) or railroad track (predominantly in North America). The term permanent way also refers to the track in addition to lineside structures such as fences etc.
 * In rail terminology, a rail spike is a large nail with an offset head that is used to secure rails or tie plates (or baseplates) to ties in the track. Spikes are driven into wooden ties either by hammering them with a spike hammer by hand, or in an automated fashion with a spiker. Many railways use large wood screws, also called lag screws, to fasten the tie plates (or baseplates) to the railroad ties.  Machine screws (or bolts) are also used to hold fishplates on jointed rail. The presence of the letters HC (high carbon) on a spike's head indicates that the spike contains about 0.40% carbon. The American Railway Engineering and Maintenance of Way Association sets the technical standards for the proper manufacture and use of this part by U.S. railroads [American Railway Engineering and Maintenance of Way Association].




 * Track ballast forms the trackbed upon which railway sleepers (UK) or railroad ties (US) are laid. It is packed between, below, and around the ties. It is used to facilitate drainage of water, to distribute the load from the railroad ties, and also to keep down vegetation that might interfere with the track structure.




 * A rail fastening system is a means of fixing rails to railroad ties (UK sleepers). The terms rail anchors, tie plates, chairs and track fasteners are used to refer to parts or all of a rail fastening system.  Various types of fastening have been used over the years.




 * In rail terminology, a fishplate, splice bar or joint bar is a metal bar that is bolted to the ends of two rails to join them together in a track. The name is derived from fish, a wooden bar with a curved profile used to strengthen a ship's mast. The top and bottom edges are tapered inwards so the device wedges itself between the top and bottom of the rail when it is bolted into place. In rail transport modelling, a fishplate is often a small copper or nickel silver plate that slips onto both rails to provide the functions of maintaining alignment and electrical continuity.




 * Track gauge or rail gauge is the distance between the inner sides of the heads of the two load bearing rails that make up a single railway line. Sixty percent of the world's railways use a standard gauge of . Wider gauges are called broad gauge; smaller gauges, narrow gauge. Break-of-gauge refers to the meeting of different gauges.


 * Automatic Warning System (AWS)'''= It is a form of limited cab signalling and train protection system introduced in 1956 in the United Kingdom to help train drivers observe and obey signals they otherwise would have failed to notice.

I think it's all sorted now.--Wipsenade (talk) 11:06, 27 December 2010 (UTC)

Info box width
Why does the info box have "box_width  = auto" twice, and yet not be wide enough for the map which displays here, but not when viewed alone, with one line of annotation wrapped giving the railway line a gap?--SilasW (talk) 08:59, 9 May 2010 (UTC)

Correction required in Greenford area?
A small correction is needed to the map. The siding marked J Lyons just east of Greenford should in fact be to Rockware Glass. The Lyons sidings were west of Greenford. I used to live on the Medway Estate to the south, and my Dad worked for Lyons. — Preceding unsigned comment added by 77.86.118.24 (talk) 15:22, 9 May 2012 (UTC)
 * Quite right - the Lyons factory was located beside the Paddington Branch of the Grand Union Canal, just across the line from the British Bath Company factory. I'll make that correction to the map now. Bluebird207 (talk) 19:52, 27 September 2012 (UTC)

External links modified
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Move discussion in progress
There is a move discussion in progress on Talk:Redhill to Tonbridge Line which affects this page. Please participate on that page and not in this talk page section. Thank you. —RMCD bot 01:16, 26 January 2017 (UTC)

Move discussion in progress
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Recommend this article be renamed
The line does not run from Acton but instead from Old Oak Common Junction and then on to South Ruislip. This is mentioned in the first paragraph of the article. It will be specially mentioned that section from Old Oak Common to Greenford West Jn closed to all traffic from 10th December for construction of HS2. Steamybrian2 (talk) 16:51, 16 December 2018 (UTC)
 * Return it to New North Main Line as that is its former name, and an existing redirect? Britmax (talk) 17:54, 16 December 2018 (UTC)