circle interchange, chicago. i chose this urban space because it follows logics of road width and constraints of separation, but also provides for some level of creativity in how the ramps cross each other.
each piece of the system is sketched separately using offset to fix the width of each section of road.
the surface streets are sketched using infinite lines and fixed in width and position relative to one another.[click image to view animation of flexing]
each ramp can move within the system without varying in width and stays attached to the highways.