Everyday urban life involves multiple choices of transport mode, route path and time budgets as individuals seek to move between places and projects in various parts of any city. In this paper we map the time/space zones of accessibility from any given location (isochrones) as a means to understand the ways we make choices between modes – a space/time phenomenology of everyday mobility. Harvesting data from Google Maps and other internet sources we map four primary transport modes – car, public transport, walking and cycling – and the inevitable mix between them. Within frameworks of transit-oriented development and assemblage theory we seek to understand the morphological and infrastructural conditions under which people may choose public transport and active modes of walking and cycling over the private car. Our case studies are in the suburbs of Melbourne under conditions of high car-dependency and low public transport provision. This work has several outcomes. It shows some of the prospects and limits of harvesting the emerging range of data sources as a means of mapping capacities for urban mobility. It also demonstrates the power of mapping as a production of urban knowledge in a manner that enables us to gear rigorous urban analysis to the phenomenology of everyday life and transport mode choice. Finally, it is a form of design research in that it tests the ways in which designed infrastructural change can transform the space/time flows of everyday life.