Ok. You can just assume that you currently live in an AnCap world where most contracts are implicit and in them there's a clause that says that most disputes that can't be solved by something called a law-book is solved by majority vote. You are free to move anywhere, but be aware that most AnCaps in this world share this view.
Have a look at any major city. An accident in the wrong place locks the place up for hours, even if you can route around the accident. And in in most cities they have these things called "houses". They kind of block they way for new roads.
1) That would be great, if it remotely resembled anything an AnCap would do...which none of it does. Try again.
2) Right, because houses take up the whole yard, especially the front part by the street. Yes, you can damage traffic flow by blocking certain roads, but you can't stop it completely, and even assuming you want to waste money by doing so, eventually you'll run out, and more sensible people will come into possession of your roads.