There are many players in the world of transport policy these days. On net, this influx of new actors into the policy, advocacy and planning realms is likely a benefit, but does offer some concerns. One thing that I see again and again is that new entrants and existing players in the world of urban transport policy too often don’t know or have forgotten lessons learned in the past. On one level this is just a nuisance, and it is good that old knowledge is rediscovered. On another more troubling level this is like health professionals having to rediscover penicillin every other generation.
Here are two recent examples where existing knowledge is ignored or not known or marginalized.
In a recent Vox piece the concept of induced demand was discussed with reference to recent empirical work by the economists Gilles Duranton and Matthew Turner (a few months ago Wired also…
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Utopia, you are standing in it! 
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