Bellmouth Passage connects two docks together near the east end of Canary Wharf. Within the space of about 100m, there are no less than five opening bridges.
The first two were designed by Wilkinson Eyre with NRM Bobrowski, and each carry highway traffic above the waterway. The Passage isn't used much by waterborne vessels (especially right now, while West India Dock is occupied by the gargantuan construction site for a CrossRail station), but opening bridges are necessary for when waterway traffic returns.
It operates a little like a Scherzer rolling lift bridge, which is a bascule bridge which rolls back onto a curved girder, with a motion like a rocking chair. In the Scherzer design, the centre of rotation moves horizontally, whereas at Bellmouth Passage, it stays in one place. The rolling girder sits on support wheels, and a rack-and-pinion motor drives the bridge.
The only similar design I've ever seen was one of the losing proposals for the Foryd Harbour bridge design competition.
One feature of minor technical interest is that trief kerbs are deemed sufficient to keep vehicles on the road, allowing the use of lightweight mesh pedestrian parapets and timber footways. Unsurprisingly, this has led to seepage staining below, likely to be followed by paint loss and corrosion if road salts are being used on the highway.