本研究旨在探討航空旅客前往桃園機場的運具選擇行為，找出各運具的目標客群，並針對機場聯外部分提出增加桃園機場捷運運量的改善策略。情境設計以吸引私人汽車、計程車和客運的旅客轉移使用機場捷運。研究方法採用多種羅吉特模式以探討影響旅客選擇機場聯外運具的因素。本研究於桃園機場發放旅客問卷，蒐集顯示性偏好及敘述性偏好資料。研究結果顯示，旅行時間、旅行成本及受訪者旅次與社經特性為影響運具選擇的重要因素。旅行時間與成本具有隨機品味異質性，計程車、巴士客運及捷運間有高度的替代性。桃園機場捷運的目標客群為年輕族群、攜帶少量行李及從事休閒目的之旅客。提供捷運轉乘折扣與提升轉乘的便利性對機場捷運運量提升是有效策略。

This study aims to explore air travelers’ behavior of airport access mode choice, identify target customers of various modes, and propose strategies to increase the ridership of the Taoyuan airport metro. The design scenarios intend to attract private vehicles, taxi and bus users shifting to airport metro. Various logit models are used to identify factors affecting airport access mode choice. The revealed preference and stated preference data were collected from passengers departing at the Taiwan Taoyuan International Airport. The results show that travel times and costs as well as respondents’ trip and socioeconomics characteristics are important determinants. The parameters of travel times and costs present random taste heterogeneity. Taxi, bus, and airport metro are close substitutes. Target customers of Taoyuan airport metro consist of young adults and travelers carrying a small number of luggage for the leisure purpose. Strategies that offer transfer discounts and increase transfer convenience are likely to be effective in increasing ridership of airport metro.