File talk:Viaduct in Puxi, Shanghai.jpg

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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:[reply]

  • 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