I agree this dog should not be allowed to run loose. Actually, NO dog should be allowed to run loose. I'm surprised she doesnt take off after squirrels, rabbits and the like,too, being a hound. Either way you are endangering your dog's life by letting this continue, nevermind possibly breaking laws, if she is straying onto other people's property. They may like your dog but that doesnt give you the right to let her roam on their property, possibly defecating on their lawn, etc. Also consider what would happen if a truck was in an accident while trying to avoid your dog and the driver is injured or worse.
Take her out on a lead only , and spend some money on a nice fenced enclosure.