How failure to design properly makes death more likely

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As Easy As Riding A Bike

Back in late 2011, I wrote a post about how the TfL policy of ‘smoothing traffic flow’ is antithetical to the creation of space for cycling. Creating ‘smooth flow’ means attempting to push as many motor vehicles through a green signal phase as possible, either through longer phases, or more stacking lanes. A ‘100% efficient’ junction is one at which all the queuing motor vehicles manage to pass through the junction on a green signal; the queue disappears at each signal phase. So taking some of that space away for cycling, or allocating more time for pedestrians to cross, will inevitably mean ‘flow’ is ‘less smooth’, when flow is measured purely in terms of motor vehicles.

The context for this post was the death of Deep Lee at the King’s Cross gryatory in October of that year, and a public meeting in December at which TfL representatives tried to…

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