How does Mn/DOT determine where to place noise walls?
A. A computerized noise model program is used for all Type I and Type II projects to predict design year (usually twenty years in the future) traffic noise levels. All locations that are predicted to have impacts are then considered for noise mitigation. Analysts make every attempt to qualify these impacted locations for noise walls based on the reasonable, feasible and cost effectiveness criteria. For Type II projects, areas are identified by their ranking in the Noise Priority Study. Noise Walls are not placed along highways that have uncontrolled access points due to the loss of effectiveness from numerous openings in the walls.
A. A computerized noise model program is used for all Type I and Type II projects to predict design year (usually twenty years in the future) traffic noise levels. All locations that are predicted to have impacts are then considered for noise mitigation. Analysts make every attempt to qualify these impacted locations for noise walls based on the reasonable, feasible and cost effectiveness criteria. For Type II projects, areas are identified by their ranking in the Highway Noise Abatement Study. Noise Walls are not placed along highways that have uncontrolled access points due to the loss of effectiveness from numerous openings in the walls.
