(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 Sec. 1037.630,
(b) The CO2 standards for tractors above 26,000 pounds GVWR are given in Table 1 to this section. The provisions of Sec. 1037.241 specify how to comply with these standards.
Table 1 to Sec. 1037.106--CO2 Standards for Tractors Above 26,000 Pounds GVWR----------------------------------------------------------------------------------------------------------------
CO2 standard
(g/ton-mile) CO2 standard
GVWR (pounds) Sub-category for model (g/ton-mile)
years 2014- for model year
2016 2017 and later----------------------------------------------------------------------------------------------------------------26,000 33,000........................ Low-Roof Day Cab................ 81 80
Low-Roof Sleeper Cab............ 68 66
Mid-Roof Day Cab................ 88 86
Mid-Roof Sleeper Cab............ 76 73
High-Roof Day Cab............... 92 89
High-Roof Sleeper Cab........... 75 72----------------------------------------------------------------------------------------------------------------
(c) No CH4 or N2O standards apply under this section. See 40 CFR part 1036 for CH4 or N2O standards that apply to engines used in these vehicles.
(d) You may generate or use emission credits under the ABT program, as described in subpart H of this part. This requires that you specify a Family Emission Limit (FEL) for each pollutant you include in the ABT program for each vehicle subfamily. The FEL may not be less than the result of emission modeling from Sec. 1037.520. These FELs serve as the emission standards for the specific vehicle subfamily instead of the standards specified in paragraph (a) of this section.
(e) Your vehicles must meet the exhaust emission standards of this section throughout their full useful life, expressed in service miles or calendar years, whichever comes first. The following useful life values apply for the standards of this section:
(1) 185,000 miles or 10 years, whichever comes first, for vehicles at or below 33,000 pounds GVWR.
(2) 435,000 miles or 10 years, whichever comes first, for vehicles above 33,000 pounds GVWR.
(f) You may optionally certify a tractor to the standards and useful life applicable to a higher vehicle service class (such as heavy heavy-duty instead of medium heavy-duty), provided you do not generate credits with the vehicle. If you include smaller vehicles in a credit-generating subfamily (with an FEL below the standard), exclude its production volume from the credit calculation.