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Noise generated by Road Traffic

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

Download and print Noise Level from Traffic chart

Download 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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Related Topics


Room acoustics and acoustic properties. decibel A, B and C calculations. Noise Rating (NR) curves. Sound transmission through walls. Calculate sound pressure, sound intensity and sound attenuation.

Related Documents

Noise - Acceptable dBA Level

Acceptable noise - dBA - level at typical common locations.

NR - the Noise Rating Curve

The Noise Rating (NR) Curve used to determine acceptable indoor environments for hearing preservation, speech communication and annoyance.

Outdoor Ambient Sound Pressure Levels

Outdoor ambient sound pressure levels (dBA) in rural and urban business and industrial environments with or without limited traffic.

Propagation of Outdoor Sound - Partial Barriers

The transmission of outdoor sound through and around barriers - the Fresnel Number.

Propagation of Sound Outdoors - Attenuation vs. Distance

The propagation of outdoors sound vs. distance and attenuation.

Vehicles Traffic Flow and Density

Traffic flow and density as used in highway design.

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