Code of Federal Regulations
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49 CFR Department of Tran...
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B Other Regulations Relat...
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III Federal Motor Carrier...
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325 Compliance With Inter...
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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