No facilities for tankers

The above is on a sign on the approach to a layby on the A449 north of Worcester. Just curious as to its meaning. I’ve not seen it anywhere else either.

Probably means no tank wash ■■? Just a guess

May be they dont want tankers in there

At a guess, I would say some naughty tanker driver has dumped the dregs of a load there at sometime - the council have picked up on it and are politely saying ‘Don’t do it again - OR ELSE!! You have been warned’.

Steve