Geese will move very quickly to avoid a slow moving car. All the first driver needs to do is drive slowly into the parade of birds. Don’t drive so quickly as to hit the bird but slow and steady. The procession of fowl will accelerate their walk or even take to a short flight.
You won’t harm the birds by doing this. You may make them a little upset but there will be no lasting harm. In addition, you and the cars behind you can get on with their business.