There are lots of causes of sprawl, and lots of types of sprawl. Sprawl is more complicated than a piece of cake. We need as many as possible. Right now I am going to put three tools in your anti-sprawl toolkit. They are three general tools, you can use them in many ways and in many combinations.
Traffic lights have three colors.
Red, yellow, green. If you can remember that then you can remember the three tools I will present here, because they are a red light, a yellow light, and a green light. Here is what I mean. The first tool against sprawl is the red light . Stop sprawl directly.