Research on the Analysis of Campus' Accessibility Based on Individual Activity Type

摘要

The previous accessibility model is fundamental but neglects activity type on transportation analysis and planning. It fails to comprehensively evaluate individuals' travel behaviors and their utilizable spatial-temporal resources under different activity types. This paper applies time geography method and classifies the activity types according to the characteristics and the elastic degree of individual activities. And then, the spatial temporal accessibility model and extended model based on the characteristics of different activity types are constructed. Moreover, a case study of campus trip data is given to verify the rationality of the models. The results show that when considering the type of activities, the accessibility does not follow the characteristics of scatter diagram and a "core to periphery" layer structure which is from high to low. Instead, it is determined by the type of activity. The stronger the mandatory activities are, the higher the accessibility of the region will be. Furthermore, when there are only one kind of facilities, the travel distance and time are major factors affecting the value of accessibility, and the personal selection of facilities follows the principle of proximity. The results are more consistent with the real life, therefore the proposed models are more rational. The results of this study provides great reference to the quantification of urban accessibility and theoretical support to the allocation of public urban facilities.