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Feasibility refers to both Acoustic Feasibility and Engineering Feasibility.
In order to be considered acoustically feasible, at least 75% of the impacted residences must benefit from the noise barrier. A benefit is considered a noise level reduction of at least 5 decibels.
Engineering Feasibility looks at such factors as topography, safety, drainage, utilities, access, and a 25’ height limitation for noise walls. Sometimes one or more of these factors can make a noise wall extremely difficult or impossible to construct.
If a barrier does not meet both acoustic and engineering feasibility requirements, the evaluation process stops and the noise barrier is considered not feasible to construct.
