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Balerno station shown here: https://maps.nls.uk/geo/explore/side-by-side/#zoom=14&lat=55.89188&lon=-3.33291&layers=1&right=BingHyb

Not quite! For a fixed resistance, as V gets larger, I gets larger too. I think what you meant is that for a fixed power, the current is less and so the losses are less. Power= V*I so, if V is greater then, for the same power, I is less. The (resistive) losses are I^2 * R, so increase with...

Do you know if that clearance includes clearance under these two 275kV cable ducts at Blackford Avenue?

Am I alone in thinking that the Azuma speed measuring errs a bit on the cautious? With my anorak on and my GPS tracker, I tend to watch the speed of the train when travelling. Yes, I know a simple phone GPS speed app is not very accurate, but I think it is fairly consistent. And when...

Those bridges are in the Morningside and Grange Conservation Areas. They have low parapets at present (i.e. you can watch the trains easily from the bridges). With electrification the parapets would probably need to be raised which would create difficult architectural problems with these...

Many thanks whhistle. Very enlightening. So am I right then to infer (although this isn't your patch north of the border) that in the example in my OP, the CIS Controller, being a local person knowing that there are no passing loops or bi-directional signalling from Drem to Edinburgh, would...

So what does a CIS Operator do?

My apologies to whhistle, whose post #9 was one minute before my post #10 and so I had not seen it. Your explanation is most helpful: and this changes the answer to my OP. It seems that there is indeed an opportunity for manual intelligent intervention to override the expected times shown...

Thanks for these helpful responses to my OP. I take it then that the answer to my question: is: "None at all." It appears that the system is allowed to generate its own forecasts for the expected departure times at later stations, with no manual intervention. That is a shame, as there must...

How does the expected time get to be calculated for the National Rail web feed? I ask because of an example from today, whereby 1W96 (London KX - Inverness) is running about 30L (having been diverted via Gainsborough Lea Rd). It is running behind 2Y09 (North Berwick to Edinburgh) which is not...

North Berwick. No signal north of here, near Drem (except the distant signal for this one).

I think that is spot on. A buffet car only works if you are one of a group of travellers who can go to the buffet to get the food and drink for your party while others look after your belongings and your seat. Nowadays, I usually have a laptop with me at my seat and other stuff in a briefcase...

Points failure at Newbridge Junction (1630 on 15/3/2019), with trains reversing at Linlithgow and returning to Glasgow. Shame the EGIP electrification did not include the line to Dalmeny. Diesel units would have used that diversion, reversing at Dalmeny, but the new electric trains are just stuck.

Traksy now shows Platforms 5&6. But I was shocked to see the track layout. Is it really correct that P1-6 can only be accessed by a single track through the North Calton tunnel? If so, then any train signalled into P6 from before Abbeyhill will lock out any despatch from P1-5. Surely there...

ScotRail has told The Scotsman its own investigation has found the cause to be “an electrical spike at the uncoupling point”. Does that make any sense? ASLEF is quoted as saying "following the investigation by ScotRail’s fleet engineers and a full explanation of what has happened, we are...

Is EDA (Edinburgh Airport) still a non-station as far as the rail system is concerned? I ask because I travel frequently via Edinburgh airport to London airports and want to use the rail ticket machine at Edinburgh airport to collect my rail tickets. I have time to spare at my departure...

Forgive me, a non-Yorkshire man, interfering, but isn't this because there are two Claytons in (old) Yorkshire and the name was to clarify that this one was in the West Riding, just like we would write "Richmond (Yorks)" nowadays, they would have written "Clayton (West)" to differentiate it from...

Or Alloa High and the other one which would be a reminder of a 1980s sitcom.

Yes, class 365. https://www.scotsman.com/news/transport/new-scotrail-trains-to-ease-crush-on-edinburgh-glasgow-line-1-4728667 "The first of a fleet of stand-in trains has arrived in Scotland to help ease ScotRail’s carriage shortage crisis. It is due to be among ten electric trains as...

Electrifying the South Sub would achieve that. Trains could leave Waverley Eastbound and use the South Sub to turn and head west. (Newcastle works like that with its two Tyne bridges, allowing trains to depart in either direction and so effects turning of a train.) The South Sub would allow...