If your on two wheels I will nod, no problem, normally in europe they hold the left hand out, even the coppers do, unless they have set a speed trap up
@ the "leg out" or wave. nod or low hand, fingers et cetera bit,
though no "obvious" rule has to be taken/implied (pc enough?)
I`ve found, if traveling towards each other, in UK, its easier to nod as taking your right hand of, effects the throttle, and therefore is not ideal, whereas on`t continent, lifting/ putting hand out to LEFT side is easier, and o more common,
the "leg out" bit seems to be (usually) when passing another 2 and or 3 wheeled vehicle, as an acknowledgment, as again, if taking hand off throttle, it would negate the "passing" bit!
if those foreign folks all rode on the correct side of the road like us proper bike/motor bike/trick-cyclists then obviously there would be no NEED for all this confusion, simple.
Nowt wrong with being politically correct were Bikerettes are concerned D6 ,but has for women drivers that,s another ball game I,ve asked for it now.Anyway a nod,s has good has a wink so they say ,but a foot,s asking for trouble.
Well I've been to Assen for the Dutch TT a few times from Hull via Rotterdam The locals line the motorway on the route to the circuit in picnic chairs and wave to bikers plus some hang out across the bridges that go over the motorway and wave at bikers too Meanwhile the traffic on the two lane motorway keeps a gap in the middle so that bikes can filter up the middle It's the most two wheeled friendly country that I have visited including for push bikes with their extensive cycle tracks