When Reba (my Aussie) was a pup, my most important thing I wanted to train her on was coming to me no matter what, even if she was leaving food! Now this was no easy task. Our previous Aussie started chasing cars as they came in the drive, so you can understand why this was so important to me.
At first, whenever a car come in or left, I would squat down beside her and hold her there talking in nice, positive tones and words. I would say stay, good dog, good dog to keep her focused on me and not the vehicle. Once that was established, we began working on the come to me no matter what aspect. it took a lot of time and repetition, but when I call her she comes. She is 3 1/2 years old and does very well with this command. I still always praise her each time. Sometimes we have to work harder on it than others.
Now as she was learning this very valuable habit, it was not always easy. Reba is the opposite of Wrangler; she is totally food motivated. So my husband had thrown out some scraps of food in the field (which we no longer do!) and Reba was busy and was not coming when I called. So my daughter and I started searching. My daughter found Reba first and was scolding her for not coming. I stopped her because I told her that if Reba was afraid of me or her, she would never come when it was vital for her to obey. We are now reaping the reward of that training. The dogs and I will be playing outside when a car comes into the drive, I call to Reba and here she comes, and she sits and waits until the car stops, then I say “free dog” and away she goes. Sometimes she is even good enough to come to me before I call when a car comes in.