1. Towards Accessibility Planning 1.1 Accessibility definitions Many authors agree that a shift from Mobility-Oriented to Accessibility-Based Transport Planning is nowadays the key

ment (WBSCD, 2001) states that «for mobility to be sustain-able, it must improve accessibility while avoiding disruptions in societal, environmental, and economic well-being that more than offset the benefits of the accessibility improvements». But what does accessibility exactly mean? How can it be measured and improved? Accessibility is an essential feature of a well-functioning city or region, and represents a fundamental principle, because it provides a framework for understanding the reciprocal re-lationships between land use and mobility (Hull, Silva & Ber-tolini, 2012). The Oxford English Dictionary defines mobility as «the ability to move or to be moved freely and easily», while accessibility as «the quality of being accessible», where accessible is an ad-jective used to describe a place that is «able to be reached or entered». In the context of urban and transport planning, accessibility ex-Pedestrian mobility and accessibility planning: some remarks towards the implementation of travel time map