system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are roundabouts rare in America?

Not only are they rare, but they are met with a lot of resistance from the public. Obviously they are not a be-all end-all solution, but there are many situations where a roundabout would make more sense than a 4 way stop or stop lights.
gpt
You kinda need to plan roundabouts ahead. Corner properties along major roads are usually gas stations or coffee shops or diners - you'd need to buy them out to build a roundabout. They take more space.

A lot of smaller north American communities are starting to use roundabouts for new construction projects. But you couldn't put a roundabout in Times Square no matter how much it would improve traffic flow, nor on almost any heavy-traffic street-corner in America.