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§ 1037.106 Exhaust emission standards for tractors above 26,000 pounds GVWR.
(a) The CO2 standards of this section apply for tractors above 26,000 pounds GVWR. Note that the standards of this section do not apply for vehicles classified as “vocational tractors” under § 1037.630.
(b) The CO2 standards for tractors above 26,000 pounds GVWR in Table 1 of this section apply based on modeling and testing as described in subpart F of this part. The provisions of § 1037.241 specify how to comply with the standards in this paragraph (b).
Table 1 of § 1037.106—CO2 Standards for Class 7 and Class 8 Tractors by Model Year
[g/ton-mile]
| Subcategory a | Phase 1 standards for model years 2014-2016 | Phase 1 standards for model years 2017-2020 | Phase 2 standards for model years 2021-2023 | Phase 2 standards for model years 2024-2026 | Phase 2 standards for model year 2027 and later |
|---|---|---|---|---|---|
| Class 7 Low-Roof (all cab styles) | 107 | 104 | 105.5 | 99.8 | 96.2 |
| Class 7 Mid-Roof (all cab styles) | 119 | 115 | 113.2 | 107.1 | 103.4 |
| Class 7 High-Roof (all cab styles) | 124 | 120 | 113.5 | 106.6 | 100.0 |
| Class 8 Low-Roof Day Cab | 81 | 80 | 80.5 | 76.2 | 73.4 |
| Class 8 Low-Roof Sleeper Cab | 68 | 66 | 72.3 | 68.0 | 64.1 |
| Class 8 Mid-Roof Day Cab | 88 | 86 | 85.4 | 80.9 | 78.0 |
| Class 8 Mid-Roof Sleeper Cab | 76 | 73 | 78.0 | 73.5 | 69.6 |
| Class 8 High-Roof Day Cab | 92 | 89 | 85.6 | 80.4 | 75.7 |
| Class 8 High-Roof Sleeper Cab | 75 | 72 | 75.7 | 70.7 | 64.3 |
| Heavy-Haul Tractors | 52.4 | 50.2 | 48.3 |