Estimating and visualizing perceived accessibility to transportation and urban facilities

In this paper we present some estimated functions of residential location utility, perceived by individuals, varying with the distance from selected transportation and urban facilities, such as metro and train stations, highway and road junctions, as well as hospitals, green spaces and leisure centres. By summing up such functions we get a measure of the overall convenience of residing in different zones of a given study area, that we call “perceived accessibility”. The functions, estimated by means of SP-surveys, have been implemented into an accessibility Interactive Visualisation Tool (i.e. InViTo) and applied to case study of Rome (Italy). The application allows to validating the use of interactive visualization tools to measure accessibility and its potential usability to produce easy-to-read accessibility maps of urban scenarios of urban development.