Trailer legs/sunlight

TheNewBoy:
Does it automatically change the number plate for you as well■■?

I’ve had an idea about this.
Instead of the number plate there’s an LCD display that’s default setting will be to display the tractor units registration but can also be used to inform vehicles behind of stuff and helpful messages or just ■■■■ clips.

Things like:
Pulling into next layby.
My other trucks a V8
OK to pass, well sort of, no hang on not now, should have gone earlier if your quick you can go now.
Driver lost.
Bet you wish your wife was as dirty as this truck.
Want to play a game…
Etc.

Probably be abused though and just show adverts.