Advice on stopping dog from chasing things passing by our house?

We have a great pyrenees we adopted a few months ago and while he’s the sweetest dog and we love him he has the issue mentioned in the title. He doesn’t want to hurt anyone he just runs up to/in front of them and barks at them. If they happen to stop he just barks at/sniffs them. Since he’s a pyrenees I’d imagine this...