49 CFR 325.31 : Transportation (§ 1.1 To Parts 1581-1699) — (Parts 300-302 To Appendix G To Subchapter B Of Chapter Iii) — Other Regulations Relating To Transportation (Continued) (Parts 300-302 To Appendix G To Subchapter B Of Chapter Iii) — Federal Motor Carrier Safety Administration, Department Of Transportation (Parts 300-302 To Appendix G To Subchapter B Of Chapter Iii) — General Regulations (Parts 300-302 To § 325.93) — Compliance With Interstate Motor Carrier Noise Emission Standards (§ 325.1 To § 325.93) — Measurement Of Noise Emissions; Highway Operations (§ 325.31 To § 325.39) — Scope of the rules in this subpart.

4 Aug 2016

The rules in this subpart specify conditions and procedures for measurement of the sound level generated by a motor vehicle engaged in a highway operation for the purpose of ascertaining whether the motor vehicle conforms to the Standards for Highway Operations set forth in 40 CFR 202.20.

49 CFR 325.31