What does CRTN mean in UNCLASSIFIED

Road traffic noise is the sound produced by vehicles moving along a road, roadway, or highway. It is affected by vehicle speed, vehicle type and the construction of roads near the area in which it's being measured.

CRTN involves measuring noise levels caused by vehicles at a given location. The measurements are then compared to pre-defined target thresholds for road traffic noise to determine whether or not levels are considered acceptable according to the relevant regulations.

Vehicle speed, vehicle type, geographical location, time of day (as some areas become more congested during rush hour), as well as any physical features such as nearby barriers or buildings can all impact how loud road traffic noise is at a particular location.

A number of acoustic instruments such as sound level meters and acoustic cameras can be used to measure noise levels associated with road traffic. Calculations may also include using complex models in order to predict future noise exposure based on current conditions and potential changes in conditions.

There are numerous government standards and regulations that aim to reduce the impact of road traffic on surrounding areas. Restrictions are often placed on speed limits, type of vehicles involved, time restrictions for certain activities or works carried out near roads; different states have different regulations that may need to be taken into consideration when calculating Road Traffic Noise.

Depending upon your location you may have access to various resources that can help reduce the amount of noise you experience from nearby roads. These resources could include using mitigation strategies such as installing physical barriers like acoustic walls or planting trees; alternatively you can get in touch with local authorities who may be able to provide further advice or assistance.

Generally speaking, CRTN should be conducted whenever new developments are planned where additional infrastructure could contribute significantly towards increased road traffic noise levels in an area beyond what is within accepted regulations/standards; this will allow authorities/developers responsible for these projects to ensure suitable measures are put into place before they proceed.

This will depend on the complexity of the project - simple calculations made through sound level measurement instruments do not require any form of specialist knowledge but more advanced cases might require acoustics experts who have had formal training and certification in this field.

CRTN results should typically be reviewed every 6-12 months depending upon changing conditions - even minor modifications made over time may cause significant differences in sound exposure over time so it’s important that consistent monitoring takes place in order for corrective measures if required. This also applies for larger projects where multiple scenarios may need assessment over time.