An important factor in applying these strategies is a computer model for roadway noise, that is capable of addressing local topography, meteorology, traffic operations and hypothetical mitigation.
Asphalt concrete has different performance characteristics in terms of surface durability, tire wear, braking efficiency and roadway noise.
A number of cases exist where sound masking has been successfully installed for exterior applications, the most common target of concern being roadway noise.
The technology for accurate prediction of the effects of noise barrier design using a computer model to analyze roadway noise has been available since the early 1970s.
In other Western countries as well as lesser developed countries, roadway noise is expected to contribute a proportionately large share of the total societal noise pollution.
To analyze roadway noise, the ESL model was used by the plaintiff, who won this case partially due to the credibility of the computer model.
The A-weighting system is used in any measurement of environmental noise (examples of which include roadway noise, rail noise, aircraft noise).
The rough wearing surface of the chipseal generates more roadway noise at any operating speed than does typical asphalt or concrete surfaces.
Or roadway noise is measured as ambient sound, prior to introducing a hypothetical noise barrier intended to reduce that ambient noise level.
At low speeds, electric cars produced less roadway noise as compared to vehicles propelled by internal combustion engines.