Whenever I ride anywhere joggers might be present, I just accept that I'm going to have to go more slowly. Because joggers are skittish, and they tend to operate as if disconnected from reality.

I've watched joggers side-step to avoid a puddle, and almost jog right in front of a car. As such, I never announce to them, even when they're moving three wide. Any vocalization tends to make them scatter.

Better to get past them silently.