I outrun the dog if I can, but I don't try that unless I'm confident. It's much worse to run if you're ultimately going to be caught. If I'm not sure I can outrun the dog I move well out into the road if possible so there's more buffer space. I consider the dog to be behaving just as they should until it becomes obvious they have left their owner's property or are bounding in that direction - now they have no business being aggressive with me.

When I first see a dog running out and barking I say "YOU STAY BOY" in a commanding voice as though the dog is my own. Many many dogs react well to this. And even if they don't quite a lot of dogs will at least hesitate for a moment when you do that. I then immediately capitalize on their hesitation as an indication that they have obeyed me and I say "GOOD BOY! THAT'S A GOOD DOG" and more praises like that. You'd be amazed at how many dogs react well to this. Even if they weren't truly obeying me, now they go from being aggressive to wagging their tails and quite proud of how "good" they can be.

Dogs are very sensitive to your emotions and any indication of fear or aggression that YOU have. It helps to be aware of that and remain calm and treat the whole situation as rather matter-of-fact. Try your best to be projecting a friendly attitude and a persona where you're not just unafraid, you haven't even considered being afraid.

I've never been bit by a dog and I've been an avid cyclist for at least 40 years. I'm not saying it couldn't happen - it just has not.

Completely wild dogs are the biggest problem. I've been riding in the mountains where people have just let dogs loose in the woods and deserted them and then they had baby dogs with no human training. Those are extremely rare in my part of the country though.