Design

Updated: Friday, August 19, 2011 - 11:30

  • Noise propagation

    The specific and changing environment that a road passes through impacts on the propagation path of noise. Noise reduces with distance from a road, and soft ground and natural barriers such as hills can reduce noise.

  • Road alignment

    Removal or attenuation of traffic noise can be effectively achieved in the early stages of design by modifying route selection, horizontal/vertical alignment and gradient. However, these options can be expensive and are generally only available for new roads.

  • Traffic management

    Speed limits or traffic calming measures can be used to reduce vehicle speeds, and travel demand management can be used to reduce vehicle numbers. Reducing vehicle speed or numbers can reduce traffic noise levels, although significant changes are needed to have an appreciable impact.

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