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Vehicle emissions inspection station in Wisconsin. Arizona – biennially, in Phoenix and Tucson metro areas only, depending on age and type of vehicle. [28]California – biennially for all vehicles from out-of-state, regardless of age; and all vehicles made after 1975 which are more than six years old in all or some zip codes in 41 out of 58 counties.
Emissions from all non-road engines are regulated by categories. [49] In the United States, the emission standards for non-road diesel engines are published in the US Code of Federal Regulations, Title 40, Part 89 (40 CFR Part 89). Tier 1–3 Standards were adopted in 1994 and was phased in between 1996 and 2000 for engines over 37 kW (50 hp ...
The Texas Legislature created the Texas Highway Department in 1916 to administer federal highway construction and maintenance. In 1975, its responsibilities increased when the agency merged with the Texas Mass Transportation Commission, [3] resulting in the formation of the State Department of Highways and Public Transportation. [4] [5] [6]
The California ARB standard for light vehicle emissions is a regulation of equipment first, with verification of emissions second. The property owner of the vehicle is not permitted to modify, improve, or innovate solutions in order to pass a true emissions-only standard set for their vehicle driven on public highways.
1983: For areas with big pollution problems, Inspection and Maintenance programs were created, meaning vehicles would need to get tested for emissions. 1985: Changed the allowable amount of gasoline to 0.1 grams per gallon. 1991: Lowed the allowable emissions of HC and NOx for vehicle tailpipes
Texas Low Emission Diesel standards (TxLED) are rules regulating the quality of diesel fuels, intended to reduce pollutants (especially NOx). Since October 31, 2005, diesel fuel to be consumed by engines in 110 counties in Eastern Texas must meet these requirements: [1] Maximum aromatic hydrocarbon content of 10% by volume. Minimum cetane ...
An emission test cycle is a protocol contained in an emission standard to allow repeatable and comparable measurement of exhaust emissions for different engines or vehicles. Test cycles specify the conditions under which the engine or vehicle is operated during the emission test.
From the Dallas/Fort Worth area, trucks can reach 93 percent of the nation's population within 48 hours, and 37 percent within 24 hours. [309] Texas has 33 foreign trade zones (FTZ), the most in the nation. [310] In 2004, a combined total of $298 billion of goods passed through Texas FTZs. [310]
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