The other option is to spend time with your dog and teach it right from wrong.
Do not believe people who say that the dog is not trainable that is absolute rubbish ..... any dog can be trained if enough time is spent with it. If a dog is left to its own devices it becomes bored and looks for activities that will bring a little excitement into its life, without guidance it will opt for dangerous activities like chasing cars.
My two dogs are both rescued animals ..... at the obedience class we attend, 90% of the dogs there have been rescued ........ 50% of the dogs we meet up with on walks have been rescued. These owners are committed to doing the best for the animals they have adopted and some quite severe behaviour problems have been overcome ...... anything is possible.
Sorry if I sound preachy but I feel very strongly about this.