隨著極端氣候對於環境造成負擔日趨明顯，近年國際間積極關注降低溫室氣體排放之議題，並以降低能源消耗及溫室氣體排放量為實施目標。而近年因整體經濟發展及交通運輸需求，乃至於私人運具使用普及。因此，為兼顧民生私人運具的需求及降低溫室氣體排放，目前國際上係透過建立補貼機制，作為鼓勵使用電動運具之方式。
然而，過往探討電動運具推廣政策之相關研究指出，財政補貼缺乏穩定性，對於提升電動運具市場規模成效有限，並且無法長期延續其效益。另從污染者付費之觀點而論，透過差別訂價(Different Pricing)將車輛排放產生之環境外部成本回歸於污染者本身，同樣具有誘導民眾移轉使用電動運具之特性。鑒此，本研究將以污染者付費原則為切入點，以課徵機車排放費之方式，降低電動機車使用相對成本，形成經濟誘因，藉以探討其是否會影響燃油機車使用者之機車選擇行為，並促進使用者移轉至選擇電動機車之意願。
因此本研究以課徵機車排放費之方式建立燃油機車、換電型電動機車及充電型電動機車之三選一敘述性偏好問卷，建立多項羅吉特模型，探討影響機車選擇行為之重要因素，並試圖了解課徵機車排放費對機車選擇結果之影響。而研究結果顯示課徵機車排放費對機車選擇呈現負向顯著影響，並且選擇燃油機車之比例確實會隨著費額上升而產生逐漸下降之趨勢，反映該政策實施能有效增加電動機車使用機率，同時估計出落實機車全電化時的機車排放費每公里約需課徵3.5元。

Climate change has not only promoted internationally aggressive attention to lowering carbon emissions, but also reduced energy consumption as implementation goal. In order to take into account the dependence on specific vehicle and reduce carbon emissions, the implementation of incentives is used to improving on using electric vehicle at present. However, previous studies on electric vehicle promotion policies pointed out that financial allowances have lacked stability and limited effectiveness in increasing the usage of electric scooters. In view of this, this research will take the polluter-pays-principal (PPP) as the entry point and use emission charges to reduce the relative cost of electric scooters. It can explore whether emission charges will affect the motor choice of gasoline-fueled scooter’s users.
Therefore, this study establishes a questionnaire survey and multinomial logit model to explore a factor affecting the choice of scooters and the impact of the emission charges. The results show that the environmental pollution tax on the scooter is negative and the ratio of gasoline-fueled scooter have a decline with the increase of tax. It is reflected that implementing this policy can effectively increase the probability of using electric scooters. Moreover, it is estimated that the emission charges when the scooters are fully electrified will be charged about 3.5 NTD per kilometer.

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