Abstract
CO2 emission from transport sector is drastically increasing, and this trend will never change without any appropriate countermeasures against that. Policies relating to reduction of CO2 emission from transport sector are categorized by 1) stage in environmental influence mechanism, and 2) their method. On the other hand, a target value of CO2 emission from Japanese urban passenger transport in 2010 is assumed to be the same level as that in 1990. Its value is estimated by population size of city, considering differences of transport properties and its effects on CO2 reduction. Furthermore, required amount of each policy option for achieving the target value is calculated. Consequently, it is found that 1) no single policy option is effective, even if vehicle fuel consumption efficiency would be drastically improved, that results in necessity of combining various policy options, 2) effective measures in small cities is essential, whose transport activities are strongly dependent on automobiles and that cause about 80% of total CO2 emission from urban passenger transport.
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