From "New Start" regeneration magazine 1 June 2007

Town extensions do little for sustainability, research finds

A researcher claims new extension to existing urban areas contribute
less to sustainable development than many believe. The researcher says
that Poundbury, for example, has a higher proportion of people driving
to work than the national average or that of the local area.

He goes on to say that many of these extensions have not met the aim of
reduced car use or their sustainability appraisals carried out at the
planning stage.