The Impact of the Modal Split on accessibility in urban areas

摘要

This paper deals with accessibility in large urban areas. A simple indicator of accessibility for a certain location is the number of people who are able to reach this location from their doorstep within a certain time. Based on data on average traffic speed, modal split, transport performance and population density fom 46 large metropolitan areas the impact of the modal split of urban travel on average accessibility is examined. It turns out that accessibility within urban areas is largely independent of the modal split. Moreover the effect of modal split on average traffic speed seems to be compensated by differences in urban population density in a way that accessibility remains constant.