This has been considered. For example, Virginia greatly restricted cul-de-sacs[1], and my understanding is that the mechanism by which they accomplished this is

This has been considered. For example, Virginia greatly restricted cul-de-sacs[1], and my understanding is that the mechanism by which they accomplished this is changing the rules so that only "through streets" would be eligible for public maintenance going forward, hence if you had a cul-de-sac or private loop road or something you had to maintain it yourself. But I think that's only forward-looking, it doesn't change things for all the private roadways built in the past. 1: https://www.planetizen.com/node/37942 https://www.planetizen.com/node/37942