PART 325 -- : Title (COMPLIANCE WITH INTERSTATE MOTOR CARRIER NOISE EMISSION STANDARDS)

Subpart A - General Provisions

325.1 - Scope of the rules in this part.

325.3 - Effective date.

325.5 - Definitions.

325.7 - Allowable noise levels.

325.9 - Measurement tolerances.

Subpart B - Administrative Provisions

325.11 - Issuance, amendment, and revocation of the rules in this part.

325.13 - Inspection and examination of motor vehicles.

Subpart C - Instrumentation

325.21 - Scope of the rules in this subpart.

325.23 - Type of measurement systems which may be used.

325.25 - Calibration of measurement systems.

325.27 - Use of a windscreen.

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.

Subpart E - Measurement of Noise Emissions; Stationary Test

325.51 - Scope of the rules in this subpart.

325.53 - Site characteristics; stationary test.

325.55 - Ambient conditions; stationary test.

325.57 - Location and operation of sound level measurement systems; stationary test.

325.59 - Measurement procedure; stationary test.

Subpart F - Correction Factors

325.71 - Scope of the rules in this subpart.

325.73 - Microphone distance correction factors.

325.75 - Ground surface correction factors.

325.77 - Computation of open site requirements--nonstandard sites.

325.79 - Application of correction factors.

325.91 - Exhaust systems.

325.93 - Tires.