Median continues if no lanes pass through centre
When a road with a median connects to one which doesn't allow left turns, the median should close.
Not possible at the moment, and might be pretty hard to implement in this mod, since in vanilla lane connections and node objects are generated based on configuration of connected segments, not the other way around. In short, this is vanilla flow: the network composition data of the node and connected segments is calculated (necessary meshes based on internal asset flags) then node and segments are filled with lanes (connections (node) or regular lanes (segments)), and then, based on these connections, other system are generating lane arrows, markings, traffic signs and other props.