What Does This Sign Signify And Where Have You Seen It?

Never seen that before, I've done a euro trip for the last 20 years. I know bikers give that sign when seeing another bike instead of the UK nod .

 

Two wheels down.

 

'If you hit any wildlife make sure you return and give them both barrels'?

 

Have a good ride and respect the speed?

 

Respect all road users?

 

The sign translates to Have a good trip.

 

Have a good trip.

I use that signal if I overtake another bike just as a little courtesy.

 

Have you been naughty?

 

Black Forest - B500 ?

 

"See ya later & have a good one" at a border crossing?

 

Did not see them when I did the B500