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Noise Abatement
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How does MDOT define "feasibility and reasonableness"?
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Answer:
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Feasibility is abatement that:
- can be built while addressing safety and constructability concerns
- provides at least a design year traffic noise reduction of 5 dB(A) for 75% of impacted receivers
Reasonableness is abatement in which:
- the construction cost ($45 per square foot for the single side face surface of barrier) divided by the number of benefiting units is equal to or less than $43,410 (2013) per benefiting unit, and
- the majority of benefiting residents and property owners are in favor of the noise barrier
- provides a design year traffic noise reduction of 10 dB(A) for at least one benefitted unit and at least a 7 dB(A) reduction
for 50% or more of the benefitted units.
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