Similar thing near Terminal 5 only for the speed to pick up again.
Terminal 5 has signalling configured where the train’s speed must be maintained at or below a certain limit in order for the signal to clear. This is to protect the overlap on the shunt signal into the sidings.
15mph on that signal into the platform (and the one half way down the platform too) .
Thinking about it again, it may have been between Hatton Cross and Terminals 2 & 3 where the train slows down and then accelerates again, as I very rarely ever continued onto Terminal 5.
A speed controlled signal protects the crossover to the east of Terminal 2&3, 20mph iirc.
Most of the Picc Line tube stations are built in this way, but there are exceptions.
I can think of Finsbury Park eastbound as being this way, but not many of the other 50+ stations.
I am not sure if this has been discussed before, but why do Piccadilly line drivers approach/enter stations (on the whole), at a considerably slower pace compared to other lines?
I generally come into the platforms around 30mph, but to be honest, much faster and you risk not being able to stop as the braking capacity varies so much on each train (and sometimes each end of the same train!)
Also, if I drive too fast, there is so much time in the timetable I would just be sitting at the regulation points for a couple or three minutes, which is tedious for everyone. I suppose some enterprising soul could compare timetables from ages ago with the current timetable to see if there is more running time these days?
(As a slight aside, the 'leaf fall timetable' is coming in on 2nd Oct and last year that afforded us a generous 12 minutes from Cockfosters to Arnos, and 30mph from North Ealing to Rayners Lane, so trains will feel exceptionally slow until January 2024.)
Edited to add:
The Piccadilly is essentially a training line for the whole combine - almost nobody wants to work on the line due to the toxic environment that management encourage. So we have a disproportionate amount of 'new' drivers - most of whom are already on the transfer list to any other depot. (It is fascinating to see the length of the waiting lists for each depot - and how long a person waits after nominating - some lines/depots have people who nominated in 2017! No so the Piccadilly, if you nominate for virtually any depot, you will have a very quick response.)
So, new drivers are naturally more cautious and it's often said it takes 2 years to get to know the line properly - the majority of new drivers will be off before that if they can. And so the cycle begins again.