Originally Posted by fud24682000
I was not talking about anyone riding on the sidewalk--was referring to my vigorously sweeping sidewalk, propelling pine needles several feet into someone I happen to have my back to.
If the bike is in the street and you're on the sidewalk, with no chance for a collision, I don't think anybody is going to expect to announce themselves. Even if we don't observe you sweeping, getting pelted with pine needles (well, at least not at eye-level) is the least of our worries.
bkr