To limit access to the drive and/or to keep the dog from crossing over the line when they're running - set up the course along a fence with the Main Drive Unit and operator outside the fence.
If you only want to limit access to the drive - you can set up the course so that the main drive is behind a fence (the line running under the fence into the pay area)
Or just place a section of temporary fence between the drive and the rest of the course.
This diagram shows an example of how to set up setup along a fence.
You can set up a temporary fence for this purpose. See:
Aug 21, 2024