Interesting that the Singapore circuit has an intersection entered twice, and from opposite directions...
This was also a feature of the Woody Point circuit in Brisbane, which was used only once (in 1936) for a 'high speed reliability trial' at a time when the RACQ was trying to convince the government that they should allow racing on public roads.
The current Long Beach circuit also features something similar, although the divided highway is exited at two different intersections one block apart.