¹ Examples include the Post Processor for Air Quality (PPAQ) model developed by Garmen Associates for the New Jersey DOT, and the Surface Transportation Efficiency Analysis Model (STEAM) developed by FHWA.

² These rates are meant to represent emissions from a typical driving cycle performed at a given average speed, rather than operation of the vehicle at a constant speed.

³ ROG (reactive organic gases) is similar to VOC (volatile organic compounds).

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