re: Neighbors dog and non stop barking, wtd?

My dog barks once or twice at anyone that pulls into the yard, if he recognizes the car he quits. If he doesn’t then he will continue to bark. My neighbor has two pit bulls that run to the fence across the street everytime they let them out and they bark for five minutes or so. And we just moved closer to town so he hears a bunch of ambulance sirens and he will howl with it, trying to let him know it’s ok lol