No noise problem for commercials at new level
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ONLY one vehicle out of 80 goods vehicles of all types tested on a main road in London one day last month exceeded the latest noise level proposed by the Ministry of Transport for commercials-92 decibels (dbA). This fact has been reported to the highways and vehicles committee of the RHA by its secretary, Mr. G. H. Mitchell.
The Ministry's earlier figures (85 to 83 dbA for new vehicles and 88 to 86 dbA for existing vehicles, in two successive stages) would, however, have been exceeded by quite a number of vehicles.
The only one to register more than the 92dbA limit was a Cummins-engined Dodge; even with a special new silencer it was over the proposed figure.
(When COMMERCIAL MOTOR made its own survey—published in the issue of August 9 1963 —most goods vehicles tested proved to be comfortably within the 86dbA limit, but these tests were in Ministry-prescribed conditions on an open-road site; urban conditions can produce much higher readings.)