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Title Current State of NOx Emissions From In-use Heavy-duty Diesel Vehicles in the United States
Date Posted 12/4/2019
Description An assessment of the real-world nitrogen oxide (NOx) emissions behavior of heavy-duty diesel vehicles as measured using portable emissions measurement systems (PEMS). Some key findings include: a disproportionate amount of NOx emissions is emitted during the low-speed urban driving; highway driving, over 50 miles an hour, is the only time NOx emissions were at the certification limit; and single line-haul trucks emit the NOx equivalent of 100 cars for each urban mile driven.

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