• I've been writing one for a while ... but yes, it's not easy, especially if you want to avoid constant number-crunching, and to explain it from scratch. ETA probably sometime in the next millennium. :)

    But the main reason why there continue to be problems (London is known to have been congested in Roman times, it's not new) is because it has become increasingly over-centralised, e.g. with all those new tower blocks. There are other trends, e.g. the stay-at-home trend, but they're not enough to offset the process of over-centralisation and, of course, the tremendous increase in population. With an increase in population, in theory local areas should be revived because of higher density and people should be able to live closer to where they work, study, shop, etc. However, that always runs up against bad planning, bad transport planning, and bad development, all of which London has in jolly abundance.

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