My Spanish broom plant has become extremely large and is interfering with my driveway. This is a common problem.
Spanish broom grows much larger than the space often allotted to it.
You can prune it. I often see it pruned by shearing or just cutting back. In time this regrowth often dies or declines and look unattractive. Rejuvenation pruning is a better way to prune Spanish broom. Rejuvenation pruning is accomplished by pruning one or a few of the main stems to within a few inches of the ground.