'
유턴이 있으면서도 처리량이 우수한 교차로가 없을까 고민을 많이함.
로터리가 대충 두개면 되지 않을까? 했는데 생각보다 복잡했음
안에있는 1단 로터리는 기존의 우리가 아는 교차로고, 복잡해서 잘은 안보이지만 2단 로터리는 양방향 선로다.
처리량이 어느정도 되나면,
우회전은 아예 독립적이라서 처리량에 영향을 끼치지 않음.
좌회전은 이론적으로 가능한 가장 높은 처리량을 가짐 (불필요한 트래픽이 없다)
직진은 양방향이 가능함
여기까지는 다른 교차로도 가능한데, 핵심은 유턴이다.
유턴시에 유턴하는 곳을 제외한 나머지 세 곳 사이의 통행량이 거의 안정적임.
동쪽에서 유턴한다고 치면, 북서 남서 사이의 우/좌회전은 아예 영향이 없고, 북남 직진은 통행량이 절반이 되긴 하지만(양방향이 동시에 직진하지는 못함) 여전히 직진은 가능하다.
여기서 더 트래픽을 수용하고 싶다는건 동시유턴의 수를 늘리거나 유턴중에도 양방향 직진을 만드는건데, 그정도면 그냥 복복선을 쓰자. 아니면 유턴 없는걸 쓰거나...
나는 솔직히 저정도 처리량을 겪어본적도 없고 ltn도 안써보고 그리드도 안해봐서 필요는 없는데 갑자기 만들어봄.
실험은 제대로 안해봐서 잘 작동하는지 모르는데, 아예 막히진 않음.
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근데 보통 복선 할때 두 선로 사이 간격은 몇칸정도 함..? 나는 로보포트 하나 들어가라고 4칸 띄우는데 더 띄워야 되나....
오 이중로터리 참신하네
와 이걸 좀 더 일찍 봤어야 했어
양방향 로터리 개꼴리네