Junctions in Tunnels

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urbophile

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On Merseyrail Wirral line, the line to New Brighton and West Kirby diverges from the Chester line at Hamilton Square. There is also the stock exchange line between Liverpool Central (Northern line) and James Street (Wirral Line)
 

Ianno87

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Heathrow Central, junction between T4 & T5.

(OK, technically Heathow Airport-owned infrastructure)


On TfL Heavy Rail infrastructure, Stepney Green on Crossrail.
 

GRALISTAIR

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More than I thought - usually it would make sense to me that it is not ideal design to have junctions in tunnels. I suppose the ones under the English Channel are technically crossovers and not junctions - also not owned by Network Rail.
 

Class 170101

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Liverpool Street High Level now all covered over by buildings on top.

There will be an underground junction at Whitechapel on Crossrail.

Also DLR at Bank amongst other London Underground stations.
 

MotCO

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Slightly OT, I seem to recall that there is a junction in a road tunnel - this being in the Mersey Tunnel - which is probably unique.
 

alangla

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There’s an abandoned junction in the Eastbound tunnel between Partick and Exhibition Centre that used to lead to Kelvinbridge and the Botanic Gardens. This was the route the water took when the Kelvin flooded at Kelvinbridge and left the whole low level line and two 314s almost totally submerged.
 

LNW-GW Joint

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The approaches into Liverpool Lime St have a series of crossovers in the mile from Edge Hill, in cuttings and tunnel sections.
The immediate approaches into Birmingham New St have junctions starting in the various tunnels.
 

DJ_K666

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St Pancras Thameslink has the junction for the Canal Tunnel in the tunnel north of the station. Also as DerekC says you can see where the Hotel and York Road curves were if you look out of a Northbound train after the old Kings Cross Thameslink station. So much to see out of the window on that line.
 

CyrusWuff

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Not sure if it counts, given I'd assume they've long since been plain-lined, but the junctions built either side of Highbury & Islington to take the Northbound GN&C away from what is now the Southbound Victoria Line (Platform 5) as part of the construction of the Victoria Line would possibly fit into this category. At the time it would have all been LU infrastructure, mind you.
 

Bald Rick

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Isn't there one somewhere on the approaches to Euston?
Yes, the D.C. lines are both in single bore tunnels from Camden Junction to South Hampstead, and at the Camden end they have each have tunnelled junctions where trains can run to/from the North London Line. That and St Pancras are the best examples I can think of in the spirit of the question, as they are full running junctions, and not just a station approach where the tracks are fanning out.

Crystal Palace Junction is only just in tunnel, and then only part of it for one direction only.
 

swt_passenger

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Whichever tunnel the Strat*gic Res*rve has been moved to now must have a junction?

More seriously doesn’t the new Kings Cross layout add more junctions than now within the tunnels, some of which are well before the station?
 
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Ianno87

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Whichever tunnel the Strat*gic Res*rve has been moved to now must have a junction?

More seriously doesn’t the new Kings Cross layout add more junctions than now within the tunnels, some of which are well before the station?
At King's Cross, the facing crossover to access the North London Line incline / HS1 connection is located within the Slow Line bore of Copenhagen Tunnel.

Gasworks tunnel does not, IIRC, have any S&C located within either bore.
 

swt_passenger

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At King's Cross, the facing crossover to access the North London Line incline / HS1 connection is located within the Slow Line bore of Copenhagen Tunnel.

Gasworks tunnel does not, IIRC, have any S&C located within either bore.
I was noting that the current works provide a load more, ie in all 3 Gasworks Tunnels, and additionally one in the Copenhagen fast.
 

si404

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Also OT, but there’s technically one in the Limehouse Link in East London.
and nearby there's the underground roundabout at Canary Wharf.

There used to be more than just the one (just an offslip now for safety reasons) in the Queensway tunnel.

They seem to be more tolerated outside the UK but they are rare other than in Norway and the Faroes - both countries loving road tunnels.

With Rail, the safety concerns are far less, so there's a relatively high number of points and such inside tunnels - because it doesn't really make any difference.
 

matchmaker

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There’s an abandoned junction in the Eastbound tunnel between Partick and Exhibition Centre that used to lead to Kelvinbridge and the Botanic Gardens. This was the route the water took when the Kelvin flooded at Kelvinbridge and left the whole low level line and two 314s almost totally submerged.
Bad accident there in 1939 - 1 dead, 161 injured. See the Railway Archive Stobcross West
 

timj

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On the Tyne and Wear Metro there's an underground junction near Manors station where the non-passenger line from Jesmond comes in
 

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