Jorg Lueke wrote in news:d08d390f-0483-4db2-88b1-
:

When passing by another biker on a path do you:

Vocalize a Greeting?

I always say hi when I am passing someone from behind. That is less likely
to startle them than just riding by. Startled riders can be unpredictable,
i.e., swerving into your path.