Effect of roadway network aggregation levels on modeling of traffic-induced emission inventories in Beirut

H. Sbayti, M. El-Fadel, I. Kaysi

    Research output: Contribution to journalArticlepeer-review

    25 Scopus citations

    Abstract

    Traffic-induced emissions pose a serious threat to air quality in heavily congested urban centers. While air quality can be characterized through field measurements and continous monitoring, forecasting future conditions depends largely on estimating vehicle-emission factors coupled with mathematical modeling. Traffic and environmental planners have relied on overall average network speed in conjunction with speed-based emission factor models to estimate traffic emissions. This paper investigates the effect of three levels of roadway network aggregation, macro-scale (overall network basis), meso-scale (roadway functional class basis) and micro-scale (link-by-link basis) on emission inventories. A traffic model and an emission factor model were integrated to determine total emissions in the future Beirut Central District area for these three modeling approaches.

    Original languageBritish English
    Pages (from-to)163-173
    Number of pages11
    JournalTransportation Research Part D: Transport and Environment
    Volume7
    Issue number3
    DOIs
    StatePublished - May 2002

    Keywords

    • Emission factors
    • Macro-scale
    • Meso-scale
    • Micro-scale
    • Traffic modelling

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