A modal approach to vehicular emissions and fuel consumption model development

Wing Tat Hung, Hing-Yan Tong, Chun-Shen Cheung

Research output: Contribution to journalArticlepeer-review


This study reports on the analysis of emissions and fuel consumption from motor vehicles using a modal approach. The four standard driving modes are idling, accelerating, cruising, and decelerating. On‐road data were collected using instrumented test vehicles traveling many times through the urban areas of Hong Kong. A model was developed for estimating vehicular fuel consumption and emissions as a function of instantaneous speed and driving mode. Piecewise interpolation functions were proposed for each nonidling driving mode. Idling emission and fuel consumption rates were estimated as negative exponential functions of idling time. Preliminary modeling results showed good agreements for the test vehicles and indicated that the on‐road measurements are feasible for the development of modal emission and fuel consumption models.
Original languageEnglish
Pages (from-to)1431-1440
JournalJournal of the Air and Waste Management Association
Issue number10
Publication statusPublished - 2005


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