Why doesn’t IDOT analyze noise for every house?
Every house in close proximity to the roadway is considered in the noise analysis, either directly or indirectly by representation in an area. Noise receptors are used to represent an area with similar land use, proximity to roadway, and basic topography. Predicting noise levels at every house is not necessary when similar characteristics would provide similar noise levels. The selected representative receptor generally represents the worst-case (i.e. it is the closest to the roadway) of all receptors included in the area and noise levels can be expected to be similar for all receptors within the group.
