File talk:Viaduct in Puxi, Shanghai.jpg
In fact it's an urban 6-level stack interchange (Zhang 2008 (talk) 23:31, 18 June 2009 (UTC)), from its top to the ground:
- 1) the top road (north-south)
- 2) a |><| ("horizontal")
- 3) again, a |><| ("vertical")
- 4) the Western Yan'an Road viaduct (east-west)
- 5) the red ring (typical for walkers, bikes and motorcycles)
- 6) the bottom crossroads