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Heavy Duty Diesel Vehicle Studies

The Department undertook a project to study the effects of emissions from heavy duty diesel powered trucks operating in the New York Metropolitan Area (NYMA). Emissions from these vehicles are significant contributors to elevated levels of ozone and fine particulate matter.

The Department applied for, and received, a grant from the US Department of Transportation through the Congestion Mitigation and Air Quality Improvement program (CMAQ). With these funds, internal support, and a grant from the United States Environmental Protection Agency, the Department solicited a contractor to characterize vehicle operation throughout the region, and test vehicle emissions using various protocols.

Emission testing was performed, including federal methods and new and emerging emissions measurement technologies. The CMAQ Heavy-Duty Vehicle Testing Report summarizes the results of the truck testing. In addition to these results, the Department utilized various other methods of exhaust emissions measurements, include ultra fine particulate measurements, aerosol measurements, smoke testing, realtime particulate measurement, and fuel and lubricating oil analyses. Those test results will be posted here as soon as they are available.

This data will be invaluable in quantifying emission levels in the NYMA and in considering revisions to the federal particulate matter and nitrogen oxide emission and ambient air quality standards.


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  • NYSDEC
    Division of Air Resources
    Research - Heavy Duty Vehicles
    625 Broadway
    Albany, NY 12233-3255
    518-402-8292
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