After criticism of its lab testing regimen and the exposition of cheating software and fuel consumption over-estimations, EPA (the US Environmental Protection Agency) will conduct on-road emissions testing to all diesel model vehicles. In order to make cheating harder, the agency will not disclose specific testing conditions, but regulators believe on-road testing can be imprecise and therefore the aim is to validate laboratory results. European regulators are also planning on-road testing to ensure more accurate correlation between test results and real-world fuel economy, with mandatory on-road testing in 2017.
After criticism of its lab testing regimen and the exposition of cheating software and fuel consumption over-estimations, the US Environmental Protection Agency (EPA) will conduct on-road emissions testing to all diesel model vehicles. In order to make cheating harder, the agency will not disclose specific testing conditions, but regulators believe on-road testing can be imprecise and therefore the aim is to validate laboratory results. European regulators are also planning on-road testing to ensure more accurate correlation between test results and real-world fuel economy, with mandatory on-road testing in 2017.