R930-3-4. Noise Impact Determination

A traffic noise impact occurs, for purposes of this policy, when either of the following conditions exists at a sensitive land use: (1) The design noise level is greater than or equal to the UDOT Noise Abatement Criterion (NAC) in Table 1 for each corresponding land use category; or (2) The design noise level substantially exceeds (ten dBA or more) the existing noise level.