Helena Joyce
The Corporate Average Fuel Economy (CAFE) standards are regulations in the United States that were first enacted by Congress in 1975 to improve the average fuel economy of cars and light trucks. The aim was to reduce US oil consumption and improve national security in the wake of the 1973-74 Arab Oil Embargo. While CAFE standards do not directly incentivize consumers to choose fuel-efficient vehicles, they make it more expensive for automakers to produce inefficient vehicles by introducing penalties. The National Highway Traffic Safety Administration (NHTSA) regulates CAFE standards, and the US Environmental Protection Agency (EPA) measures vehicle fuel efficiency. The EPA has also encouraged consumers to buy more fuel-efficient vehicles, and CAFE standards are one of the most important tools available to reduce air pollution.
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What You'll Learn
Greenhouse gas emissions
Corporate Average Fuel Economy (CAFE) standards are regulations in the United States that were first enacted by Congress in 1975. The purpose of CAFE standards is to reduce energy consumption by increasing the fuel economy of cars and light trucks. This, in turn, helps to reduce greenhouse gas emissions.
The CAFE standards are fleet-wide averages that must be achieved by each automaker for its car and truck fleet each year. When these standards are raised, automakers respond by creating a more fuel-efficient fleet, which improves the nation's energy security, saves consumers money, and reduces greenhouse gas emissions. The CAFE standards are regulated by the Department of Transportation's (DOT) National Highway Traffic and Safety Administration (NHTSA). The NHTSA sets and enforces the CAFE standards, while the Environmental Protection Agency (EPA) calculates average fuel economy levels for manufacturers and sets related GHG standards.
The original CAFE standards aimed to drive automotive innovation to curtail fuel consumption. Now, the focus is also on creating domestic jobs and reducing global warming. The CAFE standards are particularly important for reducing greenhouse gas emissions and mitigating climate change. By reducing fuel consumption, CAFE standards help to lower greenhouse gas emissions, which contribute to global warming and climate change.
Over time, the CAFE standards have become more stringent, and the EPA has also encouraged consumers to purchase more fuel-efficient vehicles. In 2012, the EPA and NHTSA introduced new CAFE standards for model years 2017-2021, with a projected combined fleet-wide fuel economy of 40.3-41.0 mpg. The EPA also issued corresponding GHG standards, requiring 163 grams/mile of carbon dioxide (CO2) emissions in model year 2025. These standards are expected to be re-examined for model years 2022-2025, with NHTSA setting new CAFE standards based on the latest information.
Overall, the CAFE standards have provided significant benefits to Americans by reducing fuel consumption, lowering greenhouse gas emissions, improving air quality, and reducing the cost of driving. These standards have also encouraged the development and adoption of advanced technologies, such as electric vehicles, plug-in hybrid electric vehicles, and fuel cell vehicles, contributing to further reductions in greenhouse gas emissions.
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Carbon dioxide
Corporate Average Fuel Economy (CAFE) standards are regulations in the United States that were first enacted by the United States Congress in 1975, after the 1973–74 Arab Oil Embargo. The purpose of CAFE is to improve the average fuel economy of cars and light trucks (trucks, vans, and sport utility vehicles) produced for sale in the United States.
CAFE standards are one of the most important tools available to reduce air pollution and decrease the use of fuel per vehicle, thereby reducing oil imports and the cost of driving. The standards are set at the “maximum feasible level" to balance fuel economy with road-traffic safety.
CAFE standards are fleet-wide averages that must be achieved by each automaker for its car and truck fleet each year. When these standards are raised, automakers respond by creating a more fuel-efficient fleet, which improves energy security and saves consumers money, while also reducing greenhouse gas (GHG) emissions.
The National Highway Traffic Safety Administration (NHTSA) and the Environmental Protection Agency (EPA) play crucial roles in developing and enforcing CAFE standards. NHTSA sets and enforces the standards, while EPA calculates average fuel economy levels and sets related GHG standards. In 2012, NHTSA established final passenger car and light truck CAFE standards for model years 2017-2021, projecting a combined fleet-wide fuel economy of 40.3-41.0 mpg. EPA issued corresponding GHG standards, harmonized with NHTSA's fuel economy standards, aiming for 163 grams/mile of carbon dioxide (CO2) in model year 2025.
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Nitrogen oxide
NOx emissions are also addressed in the Phase 1 standards, which apply to combination tractors, heavy-duty pickup trucks and vans, and vocational vehicles. These standards limit NOx emissions from certain heavy-duty vehicles and engines. The Phase 2 standards, finalized in 2016, apply to semi-trucks, large pickup trucks, vans, buses, and work trucks of model years 2021-2027.
The CAFE standards, first enacted by Congress in 1975, aim to reduce energy consumption and improve fuel economy in cars and light trucks. While the standards do not directly target nitrogen oxide emissions, they contribute to reducing air pollution by improving fuel efficiency.
CAFE standards are fleet-wide averages that must be achieved by automakers each year. When these standards are raised, automakers respond by creating more fuel-efficient vehicles, which reduces greenhouse gas emissions and improves energy security. The National Highway Traffic Safety Administration (NHTSA) sets and enforces the CAFE standards, while the Environmental Protection Agency (EPA) calculates average fuel economy levels and sets related GHG standards.
In addition to the CAFE standards, the EPA has also issued rules to limit NOx emissions from heavy-duty trucks. These rules are separate from the CAFE standards but complement them by further reducing air pollution. The combination of CAFE standards and direct limits on NOx emissions is expected to significantly improve air quality and public health.
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Cancerous pollutants
Corporate Average Fuel Economy (CAFE) standards were first enacted by the United States Congress in 1975, after the 1973–74 Arab Oil Embargo. The aim was to improve the average fuel economy of cars and light trucks produced for sale in the United States, thereby reducing the nation's petroleum use. CAFE standards are one of the most important tools available to reduce air pollution, and they have since become the US Environmental Protection Agency's (EPA) most significant achievement in improving air quality.
CAFE standards are administered by the secretary of transportation via the National Highway Traffic Safety Administration (NHTSA). The EPA measures vehicle fuel efficiency and encourages consumers to buy more fuel-efficient vehicles. The NHTSA, on the other hand, has expressed concerns that smaller, more fuel-efficient vehicles may lead to increased traffic fatalities.
The original CAFE standards sought to drive automotive innovation to curtail fuel consumption, and now the aim is also to create domestic jobs and cut global warming. The standards are set at the "maximum feasible level" given considerations such as fuel economy, road traffic safety, air pollution, and carbon emissions.
CAFE standards help reduce toxic, cancerous, and smog-forming pollutants in the air. The transportation sector contributes significantly to emissions of air toxics, which are compounds known or suspected to cause cancer and other serious health issues. Under the Clean Air Act, the EPA develops tailpipe standards that reduce emissions of air toxics over time, either through direct regulations or as a co-benefit of reducing emissions of other pollutants.
The EPA's Office of Chemical Safety and Pollution Prevention (OCSPP) evaluates pesticides and toxic chemicals for risks to human health, including cancer, and puts measures in place to protect against these risks. The Office of Air and Radiation (OAR) also develops regulations under the Clean Air Act to limit pollutants that cause cancer and other adverse health effects. The EPA's research arm, the Office of Research and Development (ORD), conducts research to identify exposures to carcinogens and track environmental and health indicators related to cancer.
The World Health Organization (WHO) has concluded that particulate matter in outdoor air causes lung cancer. Even lower levels of particle pollution found in the United States have been linked to lung cancer, and it is clear that more work needs to be done to reduce harmful particle pollution.
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Smog-forming pollutants
Some major pollutants that contribute to smog formation include carbon monoxide (CO), nitrogen oxides (NO and NO2), and volatile organic compounds (VOCs) including hydrocarbons. Hydrocarbons are the main component of petroleum fuels such as gasoline and diesel fuel. Transportation emissions also include sulfur dioxide and particulate matter, although in smaller quantities than the aforementioned pollutants.
Nitrogen oxides and volatile organic compounds can undergo chemical reactions with sunlight, heat, ammonia, moisture, and other compounds to form the noxious vapors, ground-level ozone, and particles that make up smog. This process is exemplified in the formation of photochemical smog, where chemical pollutants in the air, such as nitrogen oxides and volatile organic compounds from automobile exhausts, react with sunlight to form secondary pollutants. These secondary pollutants then combine with the primary emissions to create smog.
CAFE (Corporate Average Fuel Economy) standards play a crucial role in reducing smog-forming pollutants. By improving the fuel economy of cars and light trucks, CAFE standards aim to decrease fuel consumption and, consequently, reduce the emission of pollutants that contribute to smog formation. The implementation of these standards encourages the development and adoption of more fuel-efficient vehicles, which helps to lower the overall emissions of smog-forming pollutants.
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Frequently asked questions
Corporate Average Fuel Economy CAFE standards are regulations in the United States that were first enacted by the United States Congress in 1975 to improve the average fuel economy of cars and light trucks.
CAFE standards address climate-warming gases, toxic and cancerous pollutants, smog-forming pollutants, nitrogen oxide (NOx) pollution, and carbon dioxide (CO2) emissions.
CAFE standards provide benefits such as decreased fuel use per vehicle, reduced oil imports, reduced air pollution, improved air quality, and lower costs of driving.
The National Highway Traffic Safety Administration (NHTSA) regulates CAFE standards, and the U.S. Environmental Protection Agency (EPA) measures vehicle fuel efficiency. If a manufacturer fails to meet CAFE standards, they must pay a penalty.
