Subpart D. Subpart D—Measurement of Noise Emissions; Highway Operations
- § 325.31 - Scope of the rules in this subpart.
- § 325.33 - Site characteristics; highway operations.
- § 325.35 - Ambient conditions; highway operations.
- § 325.37 - Location and operation of sound level measurement system; highway operations.
- § 325.39 - Measurement procedure; highway operations.