On-Road Vehicle Emissions Measurements with Remote Sensing Devices
This page last reviewed February 7, 2012
The objective of this project is to provide hitherto unavailable data regarding on-road emissions from more than 60,000 light-duty vehicles measured at three locations in California (LA region, Cetral Valley, and Bay Area). These results will include measured, fuel-based mass emissions not only of CO, VOC and NO, but also NH3, SO2 and NO2. All the three new pollutants are important particle precursors and NO2 is a direct and immediate ozone forming pollutant. The results will be obtained by on-road emissions remote sensing which measures the emissions in ratio to CO2. From these ratios, the mass emissions per kg of fuel can be determined. Knowledge of the average fuel density allows the results to be converted to emissions per gallon of fuel and thus, when combined with fuel sales data, will provide a fuel-based emission inventory estimate. The study will benefit ARB in improving emission inventory for CO, VOC and NO from mobile sources, developing emission inventory for NH3, SO2 and NO2 from mobile sources, and understanding regional variation of these emissions.
- ARB Chair's Air Pollution Seminar Presentation, (June 17, 2010). On-Road Motor Vehicle Emissions Including Ammonia, Sulfur Dioxide, and Nitrogen Dioxide. Announcement; Presentation (PDF - 3,842KB)
Publications for Peer-reviewed Journals
- Gary A. Bishop et al., (2010). On-Road Emission Measurements of Reactive Nitrogen Compounds from Three California Cities. Environmental Science and Technology.
- Donald Stedman et al., (2009). On-Road Motor Vehicle Emissions Including Ammonia, Sulfur Dioxide, and Nitrogen Dioxide. 19th CRC On-Road Vehicle Emissions Workshop, March 23-25, 2009, San Diego, CA. Poster (PDF - 952KB)