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.
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.