I was going to write a big screed about how adding traffic lights and all the associated equipment would be much more expensive, then I realised you were talkin

I was going to write a big screed about how adding traffic lights and all the associated equipment would be much more expensive, then I realised you were talking about stop signs! Intersections don't really have to be much bigger, and at minimum all you need is a circle painted in the middle of the intersection. Roundabouts work well when traffic flows in all directions evenly, but if not it's pretty easy to get into a situation where cars entering from a particular direction get screwed when there's lots of traffic.