This chapter examines the spatial and social conditions enabling chosen, reversible immobility, framed through the concept of accessibility by proximity. This concept informs integrated land use and transport policies that promote access to essential services within close physical proximity, primarily via active mobility, thereby reducing the need for long-distance travel. Measuring accessibility by proximity is essential for identifying territorial gaps in service provision and understanding when immobility can be configured as a choice or a constraint, as outlined in Chap. 2 . Even if extensively researched, measuring accessibility by proximity is a challenging analytical effort, particularly in medium- to low-density areas, where the concept of proximity should be reconsidered compared to the most common approaches usually applied in high-density urban cores. The chapter’s empirical section addresses these challenges by applying a methodology for measuring accessibility by proximity in a low-density context, offering new directions for analyzing accessibility in peri-urban areas.