Yes, I usually go into the street to avoid the dog poop on the sidewalk that you didn’t pick up even though you were carrying a poop bag in your pocket.

How about as a basic rule: whoever is on the right side (like we do while driving)?

Clarification: just keep to the right

The person facing Traffic should use the road -- IF there's no bus/traffic coming. If there is, you can both pause till it passes.

So it'd seem @3's Correct.

@4 -- Correction: Unless it's a One-Way street.
Then, it's gonna require some Thinking.
Good luck!