Abstract

Emission factors (EF) of volatile hydrocarbons, oxygenated organics, polycyclic aromatic hydrocarbons (PAH) and sulfur dioxide measured in a road tunnel study (Gubrist tunnel, close to Zürich, Switzerland) in September 1993 are reported, extending the previously published list. The speciation of organic exhaust emission of gasoline powered vehicles agreed generally well with recent tunnel studies from U.S.A.

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