This Guide provides brake and stability performance ratings for truck and trailer combinations, with varying brake technologies. It aims to assist the Australian road transport sector to achieve best practice in the braking and stability performance of heavy combination vehicles. It is directed towards operators and purchasers of heavy vehicles, technicians who maintain vehicles and to the suppliers of those vehicles. The Guide is based on the collective experience of operators, suppliers, regulators and industry groups. It does not replace, vary or modify existing laws and regulations. This Guide assumes that all parts of the combination are roadworthy, properly maintained to the manufacturers specifications and and fitted with appropriate and serviceable tyres that are inflated to the correct (manufacturers recommended) pressures.

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