Estimations of Real-World N2O Emissions from Road Vehicles by Means of Measurements in a Traffic Tunnel |
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| Authors: | Åke Sjödin David A Cooper Kenth Andréasson |
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| Institution: | Swedish Environmental Research Institute (IVL) , G?teborg , Sweden |
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| Abstract: | Abstract Ambient air measurements of N2O, NOx, CO, and HC based on grab sampling were conducted in a major traffic tunnel in Sweden, that carries up to 4,000 vehicles per hour, in order to estimate real-world emissions of N2O for road traffic. Two different methods—relative and mass balance—were used to calculate a N2O emission factor for the mixed vehicle fleet, which gave an average emission factor, at average speeds of 30-70 km/h, of approximately 25 mg N2O/ km, with a range of 7-56 mg/km. |
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