(01 Feb 2021, 11:32 am)reymyster9 wrote Have they done this for routes beginning with a letter such as the Ventures and X-lines?

I think it all depends which way the wind blows and then a decision will be made. 

I've heard that next week the prefix letter will be smaller.
The week after that, it will be back to normal size and the numbers will be smaller. 

Then they're gonna faff on with some more settings and see what they can come up with for the rest of the month.

There were rumours of the numbers being embedded within a heart for Valentines Day and an animated pancake for Shrove Tuesday.
They tried obtaining the rights to use Mr Chips from Catchphrase, but there was some sort of complication - so they're going to use Pacman eating Easter Eggs in April.
The Easter Eggs will each contain letters of the destination and as the bus gets closer to it, Pacman moves a little closer to the edge and eats another egg/letter.
If the team at Hannover can get it sorted, he's going to be sunbathing in a deckchair on the displays come the summer holidays.
You won't have any idea which bus number it is or where it is going though. But that doesn't seem to be of any concern at the mo for those making the decisions.