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Noise and Vibration <br />Although FTA is not the Lead Federal Agency on <br />this corridor, RTD is committed to following FTA <br />Noise and Vibration requirements. <br />• These requirements include providing mitigation <br />for all severe impacts (as measured by the FTA <br />criteria); and <br />• Mitigation for some moderate impacts. <br />• FTA criteria based on existing background <br />conditions and new impacts from project. <br />