Sir, - The introduction of speed bumps to control traffic speeds in residential areas is a good idea, producing the desired results in a simple manner, and far more effectively than radar traps or other methods of enforcement. The only criticism would be that they are generally over-harsh, forcing speed to be too severely reduced.
However, the authorities concerned, flushed with success, have now embarked on other measures that can only be described as daft.
In particular, the construction of triangular islands on two-lane roads (where the island restricts the width to one lane, and requires the traffic on the island side to yield to oncoming traffic) is inherently dangerous. Alternating the position of such islands between each side of the road produces a type of self-generating gridlock under minimal traffic flows. Such a system is available for inspection on North Avenue in Mount Merrion, south Dublin.
Are the authorities deliberately confusing traffic calming with increasing journey times, in order to dissuade motorists from using their cars? - Yours, etc.,
Ray Lund, St Kevin's Park, Dartry, Dublin 6.