Demonstrated the ability to accurately measure oxides of nitrogen (NOx) tailpipe emissions of on-road vehicles by remote sensing using the TILDAS instrument and to compare emissions from a sampling of vehicles in the South Coast Air District.
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The benefits of this project are not location specific.
The goal of the project was to measure emissions using the TILDAS instrument and to determine which vehicles produced the most NOx and N2O emissions. NOx emissions were measured with a detection limit of 10 parts per million (PPM) and N2O emissions were measured with a 15 PPM detection limit. The data showed that high NOx emitting vehicles correlate weakly with vehicle velocity, acceleration, CO emissions, or hydrocarbon emissions.
Data on the TILDAS applications, data obtained during the testing period, and recommendations for further testing under more varied conditions.