Galvanized by VW Scandal, E.P.A. Expands On-Road Emissions Testing (Published 2015)

A Rube Goldberg-type machine is being used as the United States and Canada try to catch emissions cheaters.Credit...Laura McDermott for The New York Times Concerned that cheating on vehicle emissions could be prevalent across the automobile industry, regulators in the United States and Canada are significantly expanding their on-the-road emissions tests to cover all makes and models of diesel cars

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EUで導入しようとしている実運転エミッション測定はクリアすべき排出基準を設定するが、米国EPAが行っている実運転計測は単にディフィート・デバイスを発見する目的でランダムに行われる…と言う違いがあるとのこと。