Thanks for your replies everyone.
A couple notes I did not detail in the first post:
This 2 blink “take a look” signal is never used approaching a road junction. That would be confusing.
It is never used if I can’t see far enough ahead.
It is always received with a “thank you” wave or honk or blink of the 4 ways as the other person passes.
I always use turnouts - I am not a slow driver but I am not in a rush - let the people go - I ride motorcycles and wonder why cars and rvs drive by turnout after turnout while me and 7 other cars, bikes, and loaded trucks parade along behind.
California, desert drivers, bikes, trucks, and Canadians (in no particular order) seem to figger it out. Sometimes they go “what’s he doing?” and miss the first chance then are ready when the next chance is indicated and motor on past.
Why do this? Well you drivers who close up and tailgate but don’t pass, or tailgate 2 or 3 tailgaters thereby creating a 400 ft long parade no one can pass should quit that habit. There eventually is an impatient driver who chances it and goofs it and there is braking and evasive manoeuvers that are totally unnecessary.
