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Re: Making Santa Cruz safe for pedestrians and bicyclists

From: domainremoved <Peter>
Date: Fri, 20 Mar 2015 12:12:25 +0000

More from the UK:



“There is considerable evidence in support of reducing speed limits in urban areas. A 2010 Department for Transport (DfT) publication which looked at the relationship between speed and risk of fatal injury found that the risk of fatal injury to pedestrians rose from under 1% at an impact speed of 20mph to 5.5%, or 1 in 20, at 30mph (1). Above 30mph risk increased very substantially, to over 30% at an impact speed of 40mph.

A different large scale study looking at the effect of speeds on overall accident numbers found a clear relationship. On the types of urban road likely to be considered for a 20mph limit the study found the accidents could be expected to fall by between 4% and 6% for each 1mph reduction in average speed. The greatest reductions were achievable on “busy main roads in towns with high levels of pedestrian activity” (2)

Other cities that have introduced 20mph speed limits have seen reductions in casualties. For example in Portsmouth it is estimated that 20mph limits have lowered road casualties by 8%, while in Warrington there has been a reduction in collisions of 25% in 20mph speed limit areas; Evidence from the South Edinburgh pilot area also points to a reduction in casualties (20% to January 2014).”



Peter Carpenter
Please reply to:
peterfcarpenter_at_(domainremoved)


> On Mar 20, 2015, at 11:38 AM, Peter Carpenter <peterfcarpenter_at_(domainremoved)
>
> Dear Council,
> You have made a wise decision to improve the bicycle and pedestrian paths ways on Santa Cruz. For political reasons you choose not to provide protected pathways.
>
> Given those two decisions, I urge you to lower the speed limit on Santa Cruz to 20 mph.
>
> There is no need to do a study or an experiment on the value of such a speed reduction - that reduction has already been studied, experimented with and tested throughout the UK.
>
> Here is the data:
> " By August 2002, Kingston upon Hull in the UK had introduced 112 20-mph zones and 190 km of roads subject to a 20 mph limit covering 26% of the city's streets which they described as contributing to "dramatic reductions in road casualties". Total collisions were reduced by 56%, Killed & seriously injured collisions down 90%, child casualties collisions down 64% and all pedestrian collisions down 54% and child pedestrian collisions down 74%."
>
> A report published in 2008 estimated that following the introduction of 20 mph zones in London, a reduction of casualties by 45% and killed and serious injuries by 57% occurred."
>
> Note - London extended the 20 mph limit City-wide in 2014.
>
> Why not have a 20 mph speed limit on Santa Cruz Ave in Menlo Park?
>
>
> Peter Carpenter
> Please reply to:
> peterfcarpenter_at_(domainremoved)
>
>
Received on Fri Mar 20 2015 - 05:08:38 PDT

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