Title 49

PART 325

Part 325 - Compliance With Interstate Motor Carrier Noise Emission Standards

PART 325 - COMPLIANCE WITH INTERSTATE MOTOR CARRIER NOISE EMISSION STANDARDS Authority:42 U.S.C. 4917; 49 U.S.C. 301; and 49 CFR 1.87. Source:40 FR 42437, Sept. 12, 1975, unless otherwise noted. Editorial Note:Nomenclature changes to part 325 appear at 66 FR 49869, Oct. 1, 2001.

49:5.1.1.1.3.1SUBPART A
Subpart A - General Provisions
49:5.1.1.1.3.1.1.1SECTION 325.1
   325.1 Scope of the rules in this part.
49:5.1.1.1.3.1.1.2SECTION 325.3
   325.3 [Reserved]
49:5.1.1.1.3.1.1.3SECTION 325.5
   325.5 Definitions.
49:5.1.1.1.3.1.1.4SECTION 325.7
   325.7 Allowable noise levels.
49:5.1.1.1.3.1.1.5SECTION 325.9
   325.9 Measurement tolerances.
49:5.1.1.1.3.2SUBPART B
Subpart B - Administrative Provisions
49:5.1.1.1.3.2.1.1SECTION 325.11
   325.11 Issuance, amendment, and revocation of the rules in this part.
49:5.1.1.1.3.2.1.2SECTION 325.13
   325.13 Inspection and examination of motor vehicles.
49:5.1.1.1.3.3SUBPART C
Subpart C - Instrumentation
49:5.1.1.1.3.3.1.1SECTION 325.21
   325.21 Scope of the rules in this subpart.
49:5.1.1.1.3.3.1.2SECTION 325.23
   325.23 Type of measurement systems which may be used.
49:5.1.1.1.3.3.1.3SECTION 325.25
   325.25 Calibration of measurement systems.
49:5.1.1.1.3.3.1.4SECTION 325.27
   325.27 Use of a windscreen.
49:5.1.1.1.3.4SUBPART D
Subpart D - Measurement of Noise Emissions; Highway Operations
49:5.1.1.1.3.4.1.1SECTION 325.31
   325.31 Scope of the rules in this subpart.
49:5.1.1.1.3.4.1.2SECTION 325.33
   325.33 Site characteristics; highway operations.
49:5.1.1.1.3.4.1.3SECTION 325.35
   325.35 Ambient conditions; highway operations.
49:5.1.1.1.3.4.1.4SECTION 325.37
   325.37 Location and operation of sound level measurement system; highway operations.
49:5.1.1.1.3.4.1.5SECTION 325.39
   325.39 Measurement procedure; highway operations.
49:5.1.1.1.3.5SUBPART E
Subpart E - Measurement of Noise Emissions; Stationary Test
49:5.1.1.1.3.5.1.1SECTION 325.51
   325.51 Scope of the rules in this subpart.
49:5.1.1.1.3.5.1.2SECTION 325.53
   325.53 Site characteristics; stationary test.
49:5.1.1.1.3.5.1.3SECTION 325.55
   325.55 Ambient conditions; stationary test.
49:5.1.1.1.3.5.1.4SECTION 325.57
   325.57 Location and operation of sound level measurement systems; stationary test.
49:5.1.1.1.3.5.1.5SECTION 325.59
   325.59 Measurement procedure; stationary test.
49:5.1.1.1.3.6SUBPART F
Subpart F - Correction Factors
49:5.1.1.1.3.6.1.1SECTION 325.71
   325.71 Scope of the rules in this subpart.
49:5.1.1.1.3.6.1.2SECTION 325.73
   325.73 Microphone distance correction factors. 1
49:5.1.1.1.3.6.1.3SECTION 325.75
   325.75 Ground surface correction factors. 1
49:5.1.1.1.3.6.1.4SECTION 325.77
   325.77 Computation of open site requirements - nonstandard sites.
49:5.1.1.1.3.6.1.5SECTION 325.79
   325.79 Application of correction factors.
49:5.1.1.1.3.7SUBPART G
Subpart G - Exhaust Systems and Tires
49:5.1.1.1.3.7.1.1SECTION 325.91
   325.91 Exhaust systems.
49:5.1.1.1.3.7.1.2SECTION 325.93
   325.93 Tires.