The hidden traffic metric that makes cities worse The UK doesn't use this metric to determine development infrastructure contributions, but the system is does use is still deeply regressive. Thread.

The UK's Community Infrastructure Levy (CIL) is based on the number of housing units in the development, multiplied by a standard rate determined by the local authority.

But since people often live in one local authority area but work in another, the impacts of the development on stresses on the infrastructure of other local authorities does not automatically get taken into account when setting the rates or spending the takings.

This can lead to rural local authorities near significant cities attracting developers to build in their area by setting the rates low, whilst burdening their city neighbour authority with the effects, despite them having no say on the rates set, or getting the resulting cash.

Perhaps using predicted Vehicle Miles Travelled (VMT), as suggested in this video, could be a better way of judging what new developments should pay in terms of their contribution to travel infrastructure.

I'd be interested to hear whether any research has been done in the UK on using VMT for this purpose.

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