Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
A four lane roundabout without any crossings. Center lane goes to all three directions, right lane goes straight and right. Design fits exactly into 3 by 3 tile grid.
WARNING: in some places legacy curved rails are used because it has less curvature radius so it can fit.
