Any initiative on our roads that aims to save lives has to be applauded – as long as it works.

A recent analysis of government data, by the Institute of Advanced Motorists, shows that serious accidents on roads with 20mph speed limits have increased by 26% in the last year. In the same period there was a decrease in the number of accidents on 30mph and 40mph roads.

As more and more roads are being given a 20mph limit, the government and councils need to look carefully at the effectiveness of those decisions – and consider more long-term ways of creating safer environments.

It seems that putting up a 20mph speed limit sign won’t be enough.