L,V & G?

On foreign lorries, what does the L, G & V on a green circular background mean…just wondered?

L stands for Larmarm which means it is noise-reduced and can drive at night in Austria.

G stands for Gerauscharm which means that is is noise-reduced but not recognised in Austria so cannot drive at night.

V means it has a euro-5 engine (V is Latin for 5)

Just to expand on this a little, here are a couple of scans from the international operator’s CPC manual.