Flutterby™! : 20mph 2021-10-09 00:08:51.14143+02

20mph

2021-10-09 00:08:51.14143+02 by Dan Lyke 1 comments

New research on emissions strengthens case for a 20mph default urban speed limit

New research[1] from engineering consultants, Skyrad, models the impact of capping speeds at 20mph vs. 30mph. This “real life” modelling that takes account of the stop/start nature of urban traffic yields a very different result from traditional steady-state models. It shows significant and substantial reductions in emissions: CO₂ lower by 26% and NOx 28% lower. With UK hosting COP26, campaigners are calling on governments to set 20mph or 30km/h limits as national urban/village defaults.

#Comment Re: 20mph made: 2021-10-12 02:54:45.846974+02 by: Mars Saxman

This is not "real life" modelling at all, because it assumes that speed limits are more than just a number printed on a sign, and that speeds can therefore be lowered by merely posting different signs. In *real* real life, driving speed is largely determined by road geometry...

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