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Inflatable friend


The inescapable fact is that speed kills. But until we persuade drivers that it is in their own interest to drive at safe, considerate speeds the carnage will continue. Leaving it to 'the driver's right foot', as suggested by Edmund King (NCE 14 June) is just wishful thinking.

Philomena Back's approach also begs a few questions.

While we increasingly introduce various traffic calming measures in built up areas to protect those most at risk, conventional speed control devices continue to give us all 'the hump' while damaging the environment.

Pell Frischmann and Dunlop GRG are developing an inflatable rubber road hump, the Dunlop Transcalm. It does not punish compliant drivers, is bus and emergency vehicle friendly and yet still retains a deterrent for speeding drivers.

An air valve allows deflation so vehicles cross it comfortably at the designated speed. An overide facility allows deflation for emergency vehicles.

Additionally, the rubber/air combination eliminates the noise, vibration and subsidence problems associated with conventional humps. The first on-highway pilot study has been running for four months in Puddledock, Blackfriars, courtesy of the Corporation of London.

John Gallagher (M), director, Pell Frischmann , George House, George Street, Wakefield, WF1 1LY jgallagher@pellfrischmann.


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