Towards a percolation model of accessibility: an exploratory step

Transportation networks are characterized by two complementary functions : accessibility to economic activities and mobility to carry out these activities. One of the ways to measure accessibility is the number of opportunities available to a user within a certain distance or travel time. But for users to carry out economic activities, i.e. exercise mobility, they have to at least have perceived bonds to the activities. Given this, we ask what is the process that leads to the development of these perceived bonds? We present an analytical approach based on percolation theory to explain the evolution of perceived bonds to economic activities A subjective accessibility measure, i.e. a network of perceived bonds, is developed based on economic opportunities and individuals' income levels in a transport region. This paper describes and applies, through numerical analysis, i.e. computer simulation, an application of the percolation model to accessibility.

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