5mph through stations

As the overlaps are bigger on the likes of the met. Most other places have short overlaps at stations.

Certainly on the met, every station north of Harrow on the Hill on the met main (including the watford branch) can be past through at line speed.

You can do it on some places on the picc too, but only a handful of stations.

Would this apply to the Bakerloo north of Queen's Park?

just to add temple e/b has a full speed overlap on the station starter

That's because it's a fixed block system that uses track circuits; AFAIK the track circuits beyond the starters are simply laid out in the same way as other 5mph installations.

Just to Add my two cents, why when travelling between Holborn and TCR on the Central line does the train slow so much when passing the old british museum station. I appreciate there is a crossover in that area but it seems to slow to an almost stop and as has been discussed elsewhere on this board crossovers can be passed rather faster that a stop.

I did wonder if it may be due to old signalling systems, we slow down right at the platform. but i have disregarded this idea as i though all the signalling was updated as the line went ato

The 'feeling' will differ according to where you are sat in the train!

AIUI the idea is to slow normally as station as entered, move past starter at 5mph: as soon as cab has passed, accelerate back to line speed.

When Mornington Crescent was closed for the long period of modernisation, etc. I was on a N/b 59ts to High Barnet, think then the starter signal must have been permanently off or the sections ahead were completely empty. Anyway, left Euston, must have shut off as entered the platform, then wound up fully... must have gone through at 25mph.... weird feeling that was.

They have. Posts 2 &3 in this thread.

I think Tom was trying to say that sleepers have no connection at all to the set up of signals.

Whilst the condition / type of sleepers may play a part in deciding the line speed for a particular area, I don't think it makes a huge difference. Ballast in open sections is used for drainage (ie, rain) - not something that's such an issue in tunnels.

I always sit in the same part of the train - I'm sad like that! Creature of habit!

Well "bumped" Tom, as I hadn't noticed this thread previously !

As you say, a number of locations are approach controlled and the starter will not clear until it's pre-conditions (time and or speed) have been satisfied. However, there is no obvious risk if the subsequent signals are green and thus the route is clear (unless a speed restriction is also being governed).

Cannon Street being an obvious example that fails to recognise this, it is quiet possible to be down to 5mph by the starter, but it will not clear if the train speed was not down to 15mph by the timing point half way along the platform ... in which case the train must now stop and time out before the signal clears ....but this is all pointless, when the station is closed and the advance starters (both on the eastbound and westbound ) can be seen showing green. The train has thus been delayed unnecessarily. (subject to my penultimate paragraph)

As a further thought ... which may be what Tom is saying in a very Techy way .... presumably it's not the starter's overlap that is in issue, but the inner home signal. It is the Inner home that clears you up to the starter when there is not a full speed clearance from the next signal (ie. the starter). In laymans terms, the last signal before the station will let you into the station when the back of the train in front has only just passed the signal. The starter it's self will not clear until the train in front is a full speed spad distance beyond the next signal (advance starter) which is generally a long way off.

I rather think this system is a touch dubious since it relys on a driver not loosing concentration upon entry to a platform at the same time as another train has been stopped just beyond the same platform ! anyway ...........!!!!

Of course if the starter is green then there is no real risk whatever speed the train is doing, unless the next, advance starting signal, relys on that train only having been able to attain a defined speed before reaching it ...given the distance most of them are from the starter I'd say there aren't too many of them. The risk from my preceding paragraph pertaining to the inner home is surely much greater.

sorry to go on !!! ;D ;D ;D