49 CFR Appendix A
Summary of Noise Standards, 40 CFR Part 201
November 18, 2020
Open Table
| 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. |
1Lmax = Maximum sound level; L90 = Statistical sound level exceeded 90% of the time; Ladjavemax = Adjusted average maximum sound level.
2L90 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]
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