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Yesterday in my piece about the Policy Exchange think tank's suggestion that Oxford and Cambridge ought to be allowed to expand to as many as a million homes I mentioned the work "Car Free Cities" by J H Crawford which I came across a decade ago when looking into Oxford's last Local Plan. In it he postulates a city of a million people with a topology and transport system that means that any two addresses anywhere in the city would be no more than 35 minutes apart by foot and rapid transit system.

The city is made up of many districts of about 12,000 population like strings of beads along one of three overlapping rapid transport loops. Every home is less than five minutes walk from open countryside. And whilst the densities within the districts are amongst the highest on earth (similar to Seoul, for example, although nothing is more than three stories in the reference designs) only 20% of the total 100 sq mile (10 by 10) area is developed at all, leaving all the areas between the beads and strings as open countryside or managed parkland or whatever. Overall then the density is not a lot greater than Oxford's current density and less than the average of Greater London as a whole.

So, for a bit of fun, I superimposed Crawford's one million population city topology onto the ten by ten mile square centered on the current centre of Oxford. Now sure, a million population is only probably about a third of the million households the Policy Exchange report was ultimately suggesting, but if anyone says to you that it would simply be impossible to imagine a million people in the area between Wheatley and Eynsham, Littlemore and Kidlington, you can say you have seen how, and with no traffic and only 20% of the land developed to boot! It would currently take me over an hour to get from the end of one of these loops to about a third of the way out the adjacent one, incidentally.

Now nobody is suggesting that we do this, least of all me. I'm just demonstrating that it would be possible, indeed whilst making more of the green belt actually because all the space would be accessible in minutes rather than in half an hour in the car, it would reach right into everyone's neighbourhood - with open country no more than 400m from every front door. Fitting such principles into existing cities is of course much more difficult than an academic sitting at a drawing board with a blank sheet of paper. They need not be loops for example but twelve strings with termini at the end of each. It would increase average journey times but not the overall maximum of 35 minutes door to door and could be fitted in along existing radial roads as a series of villages.

Incidentally, the picture on the right here shows some of the housing in the ward with the highest density in England, at least that I can find - a "middle level super output area" either side of the Cromwell Rd in Kensington & Chelsea.  I notice from Net House Prices that there have been 267 £1m plus residential property transactions in the last eight years in this post code area.  This is getting pretty close to the densities that would be required in a city such as that in Crawford's book.  It's hardly slum clearance stuff is it!

The Telegraph is reporting that the US backs Lord Ashdown for Afghanistan role:

US backs Lord Ashdown for Afghanistan role
By Tom Coghlan in Kabul and David Blair, Diplomatic Correspondent
Last Updated: 12:24am GMT 04/12/2007

The United States is backing Lord Ashdown, the former Liberal Democrat leader who served as the international community's "high representative" in Bosnia, to be the United Nations new "super envoy" to Afghanistan. The proposed role would see Lord Ashdown being charged with uniting the efforts of both Nato and the UN in Afghanistan. Nato officials are understood to support his candidacy for a job with exceptional power.

Can anyone doubt the talents of the man, or the esteem in which he is held around the world? But, given the history of foreign intervention in Afghanistan, could this one be a bridge too far for any international statesman? It's a pity he's probably already too old to be in the running for General Secretary after Ban Ki Moon has done two terms though.