Good Reasons for Lower Speed Limits

Eric Britton, of World Streets blog fame, recently shared a presentation compiled by Carlos Felipe Pardo entitled “The psychology of urban mobility”.

This capturing of the arguments for reduced speed limits in residential and urban areas paints a compelling picture: reduce our speeds a little and we will have fewer traffic accidents, they will result in fewer deaths and we will have more friends in our neighbourhood. Yes, please.

Here's a couple of the images, but the article and its arguments are well worth reading.  

The following message is one that all too often seems to be forgotten when it is time for cities and policy makers to figure out how they want to organize their day-to-day mobility systems.speed_vs_death_thumb.jpg

 The direct link between speed of impact and probability of death of a pedestrian/cyclist


 Then there's the steadily contracting field of view as the driver speeds up...


The restricted effective field of vision of a driver travelling at 50 kph.


Pardo also discusses the famous sketch by Donald Appleyard of the relationship between strength of community, social connections, and the density and speed of vehicles in the street:



The full Eric Britton article is well worth reading, and there is also a link to Pardo's full presentation, with even more punchy graphics.

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  • Simon Reidy
    commented 2014-07-13 11:31:27 +1000
    Very persuasive and logical arguments. In my rev-head youth I was against the suggestion of lower speed limits. As a middle-aged cyclist who no longer drives (and who has done a lot of growing up in the last twenty years!) I am most certainly in favour :)
  • @BicycleTasmania tweeted this page. 2014-07-12 15:08:12 +1000
    What to say when people ask what's point of lower speed limits