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 Code of Federal Regulations (Last Updated: November 8, 2024)
 Title 49 - Transportation
 Subtitle B - Other Regulations Relating to Transportation
 Chapter II - Federal Railroad Administration, Department of Transportation
 Part 210 - Railroad Noise Emission Compliance Regulations

  Appendix A to Part 210 - Summary of Noise Standards, 40 CFR Part 201  

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  • Appendix A to Part 210 - Summary of Noise Standards, 40 CFR Part 201

    Paragraph and section Noise source Noise standard - A weighted sound level in dB Noise measure1 Measurement location
    All Locomotives Manufactured on or Before 31 December 1979
    201.11(a) Stationary, Idle Throttle Setting 73 Lmax (slow) 30 m (100 ft)
    201.11(a) Stationary, All Other Throttle Settings 93 ......do Do.
    201.12(a) Moving 96 Lmax (fast) Do.
    All Locomotives Manufactured After 31 December 1979
    201.11(b) Stationary, Idle Throttle Setting 70 Lmax (slow) Do.
    201.11(b) Stationary, All Other Throttle Settings 87 ......do Do.
    201.12(b) Moving 90 Lmax (fast) Do.
    201.11(c) and 201.12(c) Additional Requirement for Switcher Locomotives Manufactured on or Before 31 December 1979 Operating in Yards Where Stationary Switcher and other Locomotive Noise Exceeds the Receiving Property Limit of 65 L90 (fast)2 Receiving property
    201.11(c) Stationary, Idle Throttle Setting 70 Lmax (slow) 30 m (100 ft)
    201.11(c) Stationary, All Other Throttle Settings 87 ......do Do.
    201.12(c) Moving 90 Lmax (fast) Do.
    Rail Cars
    201.13(1) Moving at Speeds of 45 mph or Less 88 ......do Do.
    201.13(2) Moving at Speeds Greater than 45 mph 93 ......do Do.
    Other Yard Equipment and Facilities
    201.14 Retarders 83 Ladjavemax (fast) Receiving property
    201.15 Car-Coupling Operations 92 ......do Do.
    201.16 Locomotive Load Cell Test Stands, Where the Noise from Locomotive Load Cell Operations Exceeds the Receiving Property Limits of 65 L90 (fast)2 Do.
    201.16(a) Primary Standard 78 Lmax (slow) 30 m (100 ft).
    201.16(b) Secondary Standard if 30-m Measurement Not Feasible 65 L90 (fast) Receiving property located more than 120 m from Load Cell.

    1 Lmax = Maximum sound level; L90 = Statistical sound level exceeded 90% of the time; Ladjavemax = Adjusted average maximum sound level.

    2 L90 must be validated by determining that L10-L99 is less than or equal to 4dB (A).

    [48 FR 56758, Dec. 23, 1983; 49 FR 1521, Jan. 12, 1984]