Navigating Bow roundabout/flyover

Many of these massive junctions in London, designed to be part of a huge London wide road system which never materialised in the end, have built in multi lane wide stretches which encourage short bursts of speed where there is space, followed by dramatic slowing down when the road narrows again. Simplify the junction, taking some of that space away from motor traffic results in more uniform speeds across a whole motor vehicle journey.

Road diets eh? It's a concept I totally love, but it's really counterintuitive so it's difficult for planners to believe that it will actually work and it's really hard to sell politically.