[sustran] Filtered permeability - World Streets
eric britton
eric.britton at ecoplan.org
Sat Mar 19 19:42:29 JST 2011
We would very much like to do an article on the state of the art of
"filtered permeability" for World Streets. IF you are strong n this area or
have a contact who is, it would be great to hear from you.
Here is how the entry in Wikipedia looked this morning:
Filtered permeability
Filtered permeability is the concept, supported by organisations such as
Sustrans <http://en.wikipedia.org/wiki/Sustrans> , that networks for walking
and cycling should be more permeable than the road network for motor
vehicles. This, it is argued will encourage walking and cycling by giving
them a more attractive environment free from traffic and a time and
convenience advantage over car driving. Evidence for this view comes from
European cities such as Freiburg <http://en.wikipedia.org/wiki/Freiburg> ,
and its rail suburb Vauban, and Groningen
<http://en.wikipedia.org/wiki/Groningen_%28city%29> which have achieved
high levels of walking and cycling by following similar principles,
sometimes described as: "a coarse grain for cars and a fine grain for
cyclists and pedestrians".[5]
<http://en.wikipedia.org/wiki/Permeability_%28spatial_and_transport_planning
%29#cite_note-melia-4> Filtered permeability requires cyclists, pedestrians
(and sometimes public transport) to be separated from private motor vehicles
in some places, although it can be combined with shared space
<http://en.wikipedia.org/wiki/Shared_space> solutions, elsewhere in the
same town or city. This is the case in some Dutch towns such as Drachten
<http://en.wikipedia.org/wiki/Drachten> .
The principle of filtered permeability was endorsed for the first time in
British Government guidance for the eco-towns programme in 2008[6]
<http://en.wikipedia.org/wiki/Permeability_%28spatial_and_transport_planning
%29#cite_note-clg-5> and later that year by an alliance of 70 organisations
concerned with public health, planning and transport in their policy
declaration: Take Action on Active Travel.[7]
<http://en.wikipedia.org/wiki/Permeability_%28spatial_and_transport_planning
%29#cite_note-adph-6>
A parallel debate has been occurring in North America, where researchers
have proposed and applied the Fused Grid
<http://en.wikipedia.org/wiki/Fused_Grid> , an urban street network pattern
which follows the principles of filtered permeability, to address perceived
shortcomings of both the 'traditional' grid and more recent suburban street
layouts. A study conducted in Washington State[8]
<http://en.wikipedia.org/wiki/Permeability_%28spatial_and_transport_planning
%29#cite_note-frank-7> found that the fused grid was associated with
significantly higher levels of walking than the other two alternatives. A
recent comparison of seven neighbourhood layouts found a 43 and 32 percent
increase in walking with respect to a conventional suburban and the
traditional grid in a Fused Grid <http://en.wikipedia.org/wiki/Fused_Grid>
layout, which has greater permeability for pedestrians than for cars due to
its inclusion of pedestrian-only paths (filtering). It also showed a 7 to 10
percent range of reduction in driving with respect to the remainder six
neighbourhood layouts in the set. [9]
<http://en.wikipedia.org/wiki/Permeability_%28spatial_and_transport_planning
%29#cite_note-8>
Thank you. Eric Britton
- - - > Would you like to support World Streets? If so please click
<http://wp.me/PsKUY-BD> here.
Read World Streets at <http://worldstreets.org/> http://worldstreets.org |
To subscribe to weekly edition: Click <http://wp.me/PsKUY-1aL> here
India Streets is on-line at <http://IndiaStreets.org>
http://IndiaStreets.org | To subscribe to weekly edition: Click
<http://wp.me/P15YEC-a2> here
Nuova Mobilità - <http://nuovamobilita.org> http://nuovamobilita.org | To
subscribe to weekly edition: Click
<http://nuovamobilita.wordpress.com/media/abbonamenti/> here
New Mobility Partnerships <http://www.newmobility.org/>
http://www.newmobility.org
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 4119 bytes
Desc: not available
Url : http://list.jca.apc.org/public/sustran-discuss/attachments/20110319/7079d79c/attachment-0001.png
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 8005 bytes
Desc: not available
Url : http://list.jca.apc.org/public/sustran-discuss/attachments/20110319/7079d79c/attachment-0001.jpe
More information about the Sustran-discuss
mailing list