Factors affecting line speeds through stations

[DarloRich]

Up to 125mph, if the track is straight enough, the signalling is up to it, and the permanent way and all associated structures are up to the necessary standard, etc...

And that's why signs say to stand back!

see Northallerton as an example!

 

[rob w]

Highly unlikely. At Haddenham, anything on the up road not stopping will almost certainly be doing 100mph through the platforms unless there is a bit of disruption on the line however on the down road the fast Birmingham often catches the fast Oxford up in that area and will be running a bit slower than usual.

especially if the stock is limited to 75mph

 

[kieron]

Just for completeness, the yellow line requirement only comes in at 100 mph for passenger trains, but 60 mph for freight trains because they are not aerodynamic (especially containers as mentioned earlier).

That's interesting. I know the bottom line through Shotton has a 75mph limit on it, and had this long before the yellow lines were drawn on it. I don't know how fast freight trains actually go through there, though. Do you know if there's a standard way to handle this sort of situation?

 

[edwin_m]

The yellow line appears in many places with much lower speeds, presumably as a risk mitigation measure where overcrowding is a concern. One example is Manchester Piccadilly through platforms, permitted speed about 15mph I think. The announcements for each train, and sometimes the platform staff, remind people to keep behind the line.

 

[Cherry_Picker]

especially if the stock is limited to 75mph

I've got no interest in counting, but I'd imagine the number of class 165 (75mph) trains which pass through Haddenham & Thame without stopping on a typical day is extremely small, almost to the point of insignificance. It's really only the Birmingham service and about half of the Oxfords which don't call at Haddenham and they are almost always formed of 100mph stock. The 165s should usually be following the 100mph stock too. Most of the problems causing delays there are really about signal section lengths rather than stock limitations. A uniform 100mph fleet would be most welcome, and it's a shame that the Chiltern service is held back by both things really.