City speed limits - Making haste too slowly

CITY centre traffic chaos and airport delays are two of the great curses of travelling and anything that can make them more bearable is to be welcomed.

It is difficult, however, to see how a city centre speed limit of 30km/h – 19mph in old money – will do anything other than increase motorists’ blood pressure.

To put this trundling silliness in context Usain Bolt ran the 2009 World Championship 100m final in an average of 37.578 km/h – 23.35 mph.