What does these signals mean?

[ainsworth74]

Hi,

Was travelling between Hull and Selby today and saw a signal that I hadn't seen before, and I'm wondering if anyone could enlighten me to its purpose and meaning? Can't remember where exactly I saw it now, but it was at normal signal height, and it displayed what looked like a white solid circle of LED lights which had been cut in half and a black section put in between the two halves, so there were two semi-circles of lights.


Thanks

Damit, that title should be "What does this signal mean".

 

[ralphchadkirk]

It's called a banner repeater. It indicates to the driver the aspect of the next signal, should it have restricted sighting. When the signal is at danger it displays a horizontal bar, and when it is at a proceed aspect it shows a bar angled at 45 degrees.

 

[TDK]

Hi,

Was travelling between Hull and Selby today and saw a signal that I hadn't seen before, and I'm wondering if anyone could enlighten me to its purpose and meaning? Can't remember where exactly I saw it now, but it was at normal signal height, and it displayed what looked like a white solid circle of LED lights which had been cut in half and a black section put in between the two halves, so there were two semi-circles of lights.


Thanks

Damit, that title should be "What does this signal mean".

This soundslike a banner repeater signal, these are installed where a main aspect signalis poorly sighted, their purpose is to show the driver wheather the signalis showing a danger or a proceed aspect. If the black bar is horizontal the proceeding signalis at danger if the blackline is at 45 degrees it shows the next signla is showing a proceed aspect. In some cases you can green banner repeaters also, thse if green indicate the next signalis showing a green aspect. It is all down to signal sighting at line speed that determines whether a banner repeater is required.

 

[driver9000]

There is also now a green version of the banner repeater in use in some parts of the LNW region around Norton Bridge I think which will have a green background instead of a white one when the signal is displaying a green aspect, if the signal is double/single yellow or danger the background will be the normal white with the bar horizontal or 45 degrees as appropriate.

 

[ralphchadkirk]

Driver9000 - it is at Norton Bridge, installed in July 2007 as part of a trial.
They then installed another at Watford Junction.

 

[driver9000]

It is all down to signal sighting at line speed that determines whether a banner repeater is required.

They can also be installed as SPAD mitigation.

You beat me to it with the green banner explanation


Thanks Ralphcharkirk, I knew Norton Bridge was in my head for some reason regarding green banners!

 

[ainsworth74]

Thats why I love this site, 10 minutes after I post a question, a simple comprehensive set of answers.

Thanks guys!

 

[royaloak]

something like this-
http://www.flickr.com/photos/kevin_r_boyd/2559233080/

 

[Railsigns]

There is also now a green version of the banner repeater in use in some parts of the LNW region around Norton Bridge I think which will have a green background instead of a white one when the signal is displaying a green aspect, if the signal is double/single yellow or danger the background will be the normal white with the bar horizontal or 45 degrees as appropriate.

There's also a green banner at Rugby:

Click here for a photo.

 

[driver9000]

There's also a green banner at Rugby:

Click here for a photo.

The photo in the link also contains a 'preliminary route indicator' although I know about these its the first one Ive seen.

 

[Railsigns]

The photo in the link also contains a 'preliminary route indicator' although I know about these its the first one Ive seen.

Here, have another one:

http://www.railsigns.co.uk/pics/pic_pri/pic_pri.html

 

[TDK]

There's also a green banner at Rugby:

Click here for a photo.

NR are going to install green banners at a lot more locations as this can only be an improvement to safety and signal prediction will be less by the drivers
--- old post above --- --- new post below ---

The photo in the link also contains a 'preliminary route indicator' although I know about these its the first one Ive seen.

There are PRI's at Coventry, Rugby, Birmingham International and I think also at Milton Keynes.

 

[Railsigns]

There are PRI's at Coventry, Rugby, Birmingham International and I think also at Milton Keynes.

There are also PRIs at [Heathrow] Airport Jcn., Saltwood Jcn., Shortlands Jcn., Springhead Road Jcn., Colwich Jcn. and Severn Tunnel Jcn. (but not at Milton Keynes).

 

[SWT Driver]

Personally I don't like them, they don't seem to be very bright or prominent & I'd suggest that they'd be easily missed in fog or mist.

 

[truckman060473]

what is the difference in the requirement of these then to the usual double amber - amber - red? when a driver gets close to a double amber he has ample time to slow down as the next will be amber before reaching the red. just a thought, unless i've missed the point somewhere.

 

[TDK]

what is the difference in the requirement of these then to the usual double amber - amber - red? when a driver gets close to a double amber he has ample time to slow down as the next will be amber before reaching the red. just a thought, unless i've missed the point somewhere.

At coventry there are 3 routes that can be displayed on the PRI, you can have flashing yellows for both the left and the right converging routes, this is very useful if you need to go to Leamington because if you get the left arrow you have been wrong routed. You can also get a verticalarrow that denotes you will remain on the up fast. The YY/Y/R is track approach and will slow the service down quite considerably more than having flashing yellows.
--- old post above --- --- new post below ---

Personally I don't like them, they don't seem to be very bright or prominent & I'd suggest that they'd be easily missed in fog or mist.

You normally get 2 on approach,I have encountered them in thick fog and they are very visible

 

[mr_moo]

Assuming you are talking about the PRIs on the Up Main approaching Coventry:
AIUI there are actually 5 indications on these.
1) Diag up left - Plat 1
2) Up - Plat 2
3) Diag Up right - Plat 3
4) Right - Plat 4 via faster route, i.e. crossover at first opportunity and use the straight route in to P4.
5) Diag down right - Plat 4 via slower route, i.e. stay on Up Main as long as possible then crossover near the end of the station platforms.

I've watched them many times on many trains as I come home (I work in Brum and live in Cov) and have seen all routings except 5. I'm fairly sure the signalling permits route 5 (I can check on the signalling plans tomorrow if anyone thinks it doesn't), so I assumed that would be the indication for it.

 

[yorkie]

what is the difference in the requirement of these then to the usual double amber - amber - red? when a driver gets close to a double amber he has ample time to slow down as the next will be amber before reaching the red. just a thought, unless i've missed the point somewhere.

Yellow, not amber!

It's not actually a signal, it does not replace any aspect. All it does is indicate that the signal round the corner is either at any aspect that allows you to proceed or an aspect that does not allow you to proceed (ie red).

 

[Railsigns]

Assuming you are talking about the PRIs on the Up Main approaching Coventry:
AIUI there are actually 5 indications on these.
1) Diag up left - Plat 1
2) Up - Plat 2
3) Diag Up right - Plat 3
4) Right - Plat 4 via faster route, i.e. crossover at first opportunity and use the straight route in to P4.
5) Diag down right - Plat 4 via slower route, i.e. stay on Up Main as long as possible then crossover near the end of the station platforms.

I've watched them many times on many trains as I come home (I work in Brum and live in Cov) and have seen all routings except 5. I'm fairly sure the signalling permits route 5 (I can check on the signalling plans tomorrow if anyone thinks it doesn't), so I assumed that would be the indication for it.

The PRIs at Coventry can only display three indications:

1) Position 0 ("Up") - Plat 2
2) Position 1 ("Diag up left") - Plat 1
3) Position 5 ("Right") - Plat 4

There is no PRI indication for Platform 3 because that route is approach released from red (as is the alternative lower speed route to Platform 4).

The PRIs that were provided at Saltwood Junction in 2002 have four indications.