This finding also set off alarm bells. Tim Eaton said road trains and the b-double length truck were not found anywhere else in the world. These large and noisy trucks are indicative of our dependence on the freight industry. The report said the majority of complaints about engine brake noise were from poor designed and inferior mufflers which do not match the vehicle's engine and engine brake systems. Design and proper maintenance was important.
Special mufflers are already available for trucks at a slightly extra cost.
Stuart Hicks said that the NTRC had not formed a definite view about what the best solution should be but was calling for input from stakeholders to determine the best approach. A draft recommendation will be given to all transport and environment Ministers by late 2001. Recent Science News .