Arlington, Virginia – The U.S. Insurance Institute for Highway Safety (IIHS) has outlined concerns regarding California’s CO2 emissions standards, saying that subsequent decreases in vehicle size and weight will adversely affect safety.

The IIHS filed a brief amicus curiae with the U.S. Court of Appeals for the Ninth Circuit.

The brief concerns the likely adverse safety consequences of state regulation of greenhouse gas, and the trend among automobile manufacturers toward using advanced engine technology to increase horsepower, rather than improve fuel economy. IIHS noted that a national energy policy promoting both vehicle safety and energy savings is a public health requirement, and that decreases in vehicle size and weight will affect safety. The IIHS also stated that California’s regulations will undermine the benefits of the reformed corporate average fuel economy (CAFE) standard established by the National Highway Traffic Safety Administration (NHTSA).

A copy of the brief can be found at IIHS.

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