EDAR (Emissions Detection And Reporting) is a portable or permanent down looking roadside system for the detection of exhaust emissions from roadway vehicles. The current version of EDAR uses scanning Lidar to simultaneously measure carbon dioxide, carbon monoxide, nitric oxide and hydrocarbons. Because EDAR scans over the entire plume it can retrieve absolute amounts or grams/mile directly. Results of testing and retrievals of absolute and relative amounts of pollutants in exhaust plumes will be discussed.

© 2014 Optical Society of America

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