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# Noise generated by Road Traffic

## Estimate noise level generated by traffic.

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

### 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

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.

## Related Topics

• ### Acoustics

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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## Citation

• The Engineering ToolBox (2003). Noise generated by Road Traffic. [online] Available at: https://www.engineeringtoolbox.com/road-traffic-noise-d_522.html [Accessed Day Month Year].

Modify the access date according your visit.

7.25.9

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