> > A 20mph restriction makes roads for drivers and
> > pedestrians safer.
> Says who?
> Says me.
> As a driver, pedestrian and cyclist.
It's hard to argue with such a well-explained argument. But let me try...
The Department for Transport commissioned a long study into 20mph limits. The results were published about 6 months ago.
First of all, why did so many councils rush to introduce 20mph limits BEFORE this study was concluded?
It's hard to shake off the suspicion they thought the study would not support the new limits, so they wanted to introduce them first - because by now it would be very messy and expensive to remove them.
In summary, the study says that it is INCONCLUSIVE whether 20mph limits really make roads safer. There was a reduction in one case (Brighton), but in all other cases the results were inconclusive. There are also lots of caveats about extrapolating the Brighton results more generally
Don't take my word for it - go to the source:
Page 66 of the headline report:
– This study has found no significant safety outcome (in terms of
collisions and casualties) in residential areas, based on the post implementation data available to date. Due
to the small sample sizes and variability in the data, the statistical analysis undertaken to date indicates that
the real change could be positive or negative. In addition, it has not been possible to draw any conclusions
regarding the relative change in fatal injuries, cycle casualties, and casualties involving older people.
In the case of both the residential and city centre case studies, further data is required to determine the longterm impact of 20mph limits. Collision and casualty rates are known to fluctuate from year to year, and the
post implementation data currently available may not be indicative of the longer-term trend.