Since accessibility is an important goal for sustainable transportation planning, this study analyzes the impact of accessibility on transit mode choice to investigate the potential reasons for the differences in the travel behavior of urban and suburban residents. To attain this purpose, two levels of spatial heterogeneity are considered. The first level is residential spatial heterogeneity, which represents the variations in the impacts of the factors between urban and suburban regions. The second level is the OD spatial heterogeneity, which represents whether the travel is between urban and suburban areas. Taking Xiamen city as a case study and considering the relationships between three OD characteristics (OD transit accessibility, OD travel distance, and OD spatial heterogeneity), this paper uses a joint analysis of the probit model and the structural equation model for multi-group samples. The results indicate that the low transit accessibility in suburban areas is related to lower public transportation use by suburban residents and less inter-regional bus travel by urban residents. The findings provide empirical support for the importance of suburban infrastructure development.

由于可达性是可持续交通规划的重要目标，因此本研究分析了可达性对公交方式选择的影响，以研究造成城市和郊区居民出行行为差异的潜在原因。为了达到这个目的，考虑了两个层次的空间异质性。第一级是住宅空间异质性，它代表了城市和郊区之间因素影响的变化。第二层是OD空间异质性，表示旅行是否在城市和郊区之间。以厦门市为例，考虑三个OD特征（OD运输可达性，OD行程距离和OD空间异质性）之间的关系，本文采用概率模型和结构方程模型对多组样本进行联合分析。结果表明，郊区的交通可达性低与郊区居民使用公共交通的减少和城市居民跨区域的公交旅行少有关。研究结果为郊区基础设施发展的重要性提供了经验支持。