Noise generated by Road 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
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.
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.