Alberta Transportation and Economic Corridors’ noise guidelines outline the conditions for noise attenuation in cities and urban areas. Noise attenuation will be considered if noise levels exceed a 24-hour weighted average of 65 decibels. These noise levels are determined by noise studies that consider roadway design, topography and anticipated traffic volumes to model, or predict, future levels. The future noise levels are used to determine if noise attenuation is warranted based on the provincial noise guidelines. Noise attenuation will not be installed for aesthetic/visual screening purposes.