I think you've got a typo--

you say 'By adding circuity for cars but not other transport modes, these types of cul-de-sacs may not encourage driving. Why drive five minutes when you can walk it in three?'

I think you meant 'by adding circuity for pedestrians' rather than 'by adding circuity for cars'.

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Hi there DLR. No, I don't think that's a typo. Circuity means 'roundaboutness', so you add circuity when you reduce the number of paths connecting nodes in a network, requiring people to take a circuitous route. In this case, the cars, forced to take a circuitous route, face a lot of circuity in their network, whereas the pedestrians have little as they can walk straight there almost as the crow flies.

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