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Noise generated by Road Traffic

Estimate noise level generated by traffic.

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Hourly traffic noise level from roads with speed 75 km/h can be indicated from the chart sbelow:

Noise level from traffic chartDownload and print Noise Level from Traffic chart

Noise level from traffic chart - correction heavy trafficDownload and print Noise Level from Traffic - Correction for Heavy Traffic chart

Example - Traffic noise from a road

From the first chart the hourly noise level from a road with 100 vehicles per hour and speed 75 km/h can be estimated to

62 dBA

If the percentage of heavy vehicles is 15% the last chart indicates that

3 dBA

must be added.

It can be assumed that the hourly noise level is approximately

62 dBA + 3 dBA = 65 dBA

Note that this level is only an indication. The noise is influenced by speed, standard and types of vehicles, tarmac quality, type of wheels with or without studs - and more.

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  • Engineering ToolBox, (2003). Noise generated by Road Traffic. [online] Available at: [Accessed Day Mo. Year].

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