Access to good public transit for low-socioeconomic communities has been an important concern in transportation planning and urban studies research. In Portland, Oregon, USA, the rapid growth of housing prices and rents in the urban core has caused displacement of low-income residents to peripheral and suburban neighborhoods where housing is more affordable. Because public transit is generally more limited in the urban periphery and suburbs, there is concern that the low-income suburban residents may have more limited access to Portland’s light rail transit service than more affluent residents do. This study examines the relationships between the light rail transit accessibility and socioeconomic status—income, race and ethnicity—in the Portland metro area. Light rail transit accessibility is compared for all income and racial/ethnic groups across four access zones. Multinomial logistic econometric models were used to measure likelihood differences of being located in different access zones between each demographic group. The results show that there is no significant barrier for low-income and racial and ethnic minority residents to access urban rail transit in Portland. The results suggest that despite low-income residents’ movement to the suburbs, Portland’s urban rail transit system continues to serve all residents by providing cohesive connections between the urban core, periphery and suburbs.

中文翻译：

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城市轨道交通为大都市区提供了必要的通道：以美国俄勒冈州波特兰市为例

低社会经济社区获得良好的公共交通服务一直是交通规划和城市研究中的重要问题。在美国俄勒冈州的波特兰市，城市核心地区的住房价格和租金快速上涨，导致低收入居民流向住房价格更便宜的外围和郊区社区。由于城市外围地区和郊区的公共交通通常受到更多限制，因此，与富裕的居民相比，低收入的郊区居民获得波特兰轻轨交通服务的机会可能会受到限制。这项研究研究了波特兰都会区轻轨交通的可达性与社会经济地位（收入，种族和种族）之间的关系。比较了四个出入区中所有收入和种族/族裔群体的轻轨交通可及性。多项逻辑计量经济学模型用于测量位于每个人口统计组之间不同访问区域的可能性差异。结果表明，在波特兰，低收入，种族和少数民族居民进入城市轨道交通没有显着障碍。结果表明，尽管低收入居民向郊区迁移，但波特兰的城市轨道交通系统通过在城市核心，外围和郊区之间提供紧密联系而继续为所有居民提供服务。结果表明，在波特兰，低收入，种族和少数民族居民进入城市轨道交通没有显着障碍。结果表明，尽管低收入居民向郊区迁移，但波特兰的城市轨道交通系统通过在城市核心，外围和郊区之间提供紧密联系而继续为所有居民提供服务。结果表明，在波特兰，低收入，种族和少数民族居民进入城市轨道交通没有显着障碍。结果表明，尽管低收入居民向郊区迁移，但波特兰的城市轨道交通系统通过在城市核心，外围和郊区之间提供紧密联系而继续为所有居民提供服务。