3.2. Sample selection
The previous section describes the spatial context of the study
area and the various scenarios investigated to identify those members
of the resident population who were commuters and who had
potential access to alternative modes of transport. The various
attributes discussed above were tested in combination to give
the formulation of the final GIS query (GISQ3). The final GIS query
specified nine different attributes and their values to identify
LSOAs that met the required criteria as suitable for sampling in this
study to meet the research objectives. The LSOAs of interest were
characterised as areas where:
– 50% or less of households had no car,
– 16% or more of people commuted by bus,
– 50% or more of people commuted by car,
– 10% or more of people commuted as passengers in a car,