[ ] FRA additionally commissioned DOT's Volpe National Transportation Systems Center to prepare a technical report (Technical Report) that researched the needs and requirements for noise emission standards for high-speed trains, considered international and industry standards, and outlined a recommended approach for noise emission standards based on proven methodologies. This approach to train noise is consistent with the existing U.S. noise emission standards framework under the Noise Control Act. 1304/2014, the Noise Technical Specifications for Interoperability (NOI TSI),[ ] as the U.S. basis for alternative, high-speed train noise emission standards. Subpart C—High-Speed Train Noise Emission Alternative ComplianceSection 210.41 ScopeThis subpart would provide an alternative approach available to HSR train manufacturers and railroads to establish noise emission compliance for train operations exceeding 160 mph, up to 220 mph. A railroad may continue to demonstrate high-speed train noise emission compliance in accordance with the standards in 40 CFR part 201.