please empty your brain below

All that space and they have to abbreviate "Pl'form".
Some serious bunching of trains on those Farringdon indicators.
It would reduce clutter if the Platform identifier were included in the heading, rather than be repeated for every departure.
Betterbee - or dropped entirely. Presumably the signage will say Eastbound/Westbound as well as Platform A/B so I don't see the need to tell passengers the platform letter, as long as there is only one pair of Crossrail platforms.

Also, the display could be made much simpler (with larger font sizes as a result) by condensing it into just the one or two next trains to each branch. Something like this Paris display.
The one date you missed from the list is 15 July 2003 when some bloke calling himself Diamond Geezer said "The nearest station to me will be at least a mile away for a start, plus Crossrail may not even be finished by 2012 in time for a potential East London Olympics."

Which means you get full points for prescience.
Anonymous - It’s overkill in most cases, though will be useful for those heading to Reading - showing only the next 2 would rarely show them when the next train's going their way.
"only a slowcoach will be interested in the second".
Or a person with reduced mobility. Or a person with a child in a pushchair. Or a person with a 25 kg piece of luggage heading for Heathrow.
One big platform letter at the top would indeed be much clearer, except at the termini which are the only places where platforms vary.

The designers have adopted a single design solution that works at 100% of stations despite the fact the last column is superfluous at 90% of them.
Martin,

Or even just use a marginally smaller font for the word 'platform'.

Oh, wait, that is a software change with all the consequences that leads to. Perhaps better leave it as it is.
Bruce - I meant the two next trains *on each branch*. Something like

Paddington - 5 min, 15 min
Heathrow via Paddington - 10 min, 20 min
Reading via Paddington - 30 min, 60 min
When Crossrail was being promoted through Parliament, the Environmental Statement predicted that it would open in 2013. See p.8 in this pdf.
The roundel squeezed in at the sides looks the wrong aspect ratio to me.

the whole legibility thing could be fixed by showing the top 2 trains in 1.5x sized and dropping the last one. I think the advantage of keeping the platform on the line is consistency and that in some stations / locations / entrances you could use a single screen to show all trains.
Anonymous (09.25) you forgat that LT/TfL has always been a supporter of the "not invented here" line of thought so is unlikely to heed your excellent suggestion.
Looking at the eastbound departures, why are there two trains arriving in 19 mins, two trains arriving in 22 minutes and so on? Are they simply taking the line on the display where Shenfield trains will fit (and in reality a couple of minutes later)?

If the first train is delayed, how many subsequent trains are likely to show as delayed? Will, for example, the next couple be adjusted but the others remain at their timetabled time or will everything shift back?
I thought there were proposals at one point that some trains will be 'fast' and some 'semi-fast', depending on how many stations are served outside of central London. This would be taking a cue from the RER in Ile-de-France. If so, some passengers would need to scan down the list to see which train serves their stop. This idea might have been abandoned though.
There'll be a variety of stopping patterns west of Paddington, although they'll correlate somewhat with destination (e.g. Most Reading trains will be semi-fast). Perhaps the displays on the platform will be more detailed.

The core and the eastern branches will be all stops as far as I know.
Agree with many of the suggested tweaks in the comments about how the departure boards could be improved...

...But I reckon the most likely outcome is that they'll use half the screen for advertising.
Interesting to read about the next train disappearing off the board x minutes before it has arrived. If it seems like an age until the "next train" then it might pay to hurry and hope to catch the one before. Don't tell TfL that we've worked that out though!
I adopt a similar approach to miker, having strolled onto the platform too many times only to miss a train that wasn't shown. Ends up counter-productive from a safety angle as it encourages me to hurry when I don't need to.
I always do that as well. I stroll briskly to the stairs leading up to the platform if I suspect a "hidden" train, and if I can hear a train (the 95 stock trains are easy to hear), sprint up the stairs!
They have very similar boards on the London Overground and have started also using them for bus departures at large bus stations.

In those contexts they work well (in fact I wonder if they’ve just modified the code that was used for the bus station delay.)

There are surprisingly good displays for this sort of thing on Thameslink these days.










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