Road and Highway development

I’m looking to create a highway and a massive road system in my game but im having trouble finding an effective way of doing so. I’ve plenty of quixel turorials but they always use special meshes and things like that. I’ve also looked at a lot of youtube videos and still don’t know how to go about making it. I want to make a road system similar to GTA 5 with very realistic highways and roads. Is there a blueprint or some special way of creating things like this?