View all text of Subpart G [§ 1037.601 - § 1037.670]
§ 1037.670 - Optional CO2 emission standards for tractors at or above 120,000 pounds GCWR.
(a) You may certify tractors at or above 120,000 pounds GCWR to the following CO
Table 1 of § 1037.670—Optional Phase 2 CO
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Subcategory | Model years
2021-2023 | Model years
2024-2026 | Model years
2026 and later | Heavy Class 8 Low-Roof Day Cab | 53.5 | 50.8 | 48.9 | Heavy Class 8 Low-Roof Sleeper Cab | 47.1 | 44.5 | 42.4 | Heavy Class 8 Mid-Roof Day Cab | 55.6 | 52.8 | 50.8 | Heavy Class 8 Mid-Roof Sleeper Cab | 49.6 | 46.9 | 44.7 | Heavy Class 8 High-Roof Day Cab | 54.5 | 51.4 | 48.6 | Heavy Class 8 High-Roof Sleeper Cab | 47.1 | 44.2 | 41.0 |
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a Note that these standards are not directly comparable to the standards for Heavy-Haul Tractors in § 1037.106 because GEM handles aerodynamic performance differently for the two sets of standards.
(b) Determine subcategories as described in § 1037.230 for tractors that are not heavy-haul tractors. For example, the subcategory for tractors that would otherwise be considered Class 8 low-roof day cabs would be Heavy Class 8 Low-Roof Day Cabs and would be identified as HC8__DC__LR for the GEM run.
(c) Except for the CO
(d) The optional emission standards in this section are intended primarily for tractors that will be exported; however, you may include any tractors certified under this section in your emission credit calculation under § 1037.705 if they are part of your U.S.-directed production volume.