運輸部門對於環境污染所造成的影響儼然成為重要課題，不同的因應措施不斷的被提出及改進，其中共享運具作為重要的發展面向並應用於各國，但共享運具與傳統大眾運輸可能造成的競爭關係也成為爭論不休的課題。有許多探討大眾運輸及共享運具間的相關研究，但已逐漸熱絡的共享電動運具中，較為缺乏共享電動機車與共享電輔車的討論，且更少有同時考量不同共享運具間可能存在的相互影響之研究，此外將心理因素或感知態度納入共享微移動的研究也相對少見。因此本研究選擇使用整合選擇及潛在變數模型來了解臺灣地區在共享電輔車逐漸進入市場後，與共享電動機車和大眾運輸將呈現什麼關係，以及了解哪些因素或態度可能影響民眾的選擇。
根據分析結果顯示，相對於共享電動機車及共享電輔車對公車所造成的替代效果，本研究未納入的其他運具產生的替代效果更為明顯；兩項共享運具間產生了明顯的替代效果，尤其是共享電輔車對共享電動機車的替代效果。在影響選擇的因素中，民眾對於公車的車內時間、共享電動機車的到達可用運具時間及共享電輔車的價格最為敏感；態度及感知價值中，環保意識及利他主義皆會對選擇該三種運具產生正向的影響。
綜合以上分析結果，在共享電輔車進入市場後，相較於共享運具與大眾運輸的競爭關係，更要注意共享運具間產生的替代效果，避免共享運具間的惡性競爭。共享電動機車的投放應避免共享電輔車密度高的區域，並著重於移動距離較長或觀光區域；共享電輔車則較不受到其他運具的替代效果，因此可著重在自身的費用、站點或設備等其餘條件。

The impact of the transportation sector on environmental pollution has become a significant issue, prompting various countermeasures. Shared mobility, as a key development direction, is being implemented globally, but its competitive relationship with traditional public transportation remains a contentious topic. Research on the interactions between shared e- moped scooters and e-bikes is limited, and even fewer studies consider the mutual influences among different shared mobility options. This study uses the Integrated Choice and Latent Variable (ICLV) model to analyze the relationship between shared e-bikes, e-moped scooters, and public transportation in Taiwan, and identifies factors influencing public choice. Results show that other vehicles have a more significant substitution effect on buses than shared e-moped scooters and e-bikes. There is a notable substitution effect between the two shared mobility types, especially with shared e-bikes replacing shared e-moped scooters. Factors influence choice the most in three modes respectively, including in-vehicle time for buses, access time for e-moped scooters, and the price of e-bikes. Environmental awareness and altruism positively impact the choice of these vehicles. The deployment of shared e-moped scooters should avoid areas with high e-bike density and focus on longer travel distances or tourist areas, while e-bikes should focus on cost, station locations, and other conditions.

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