The mathematical models discussed in Section 5.2 provide a quantification
measure of the ease of wayfinding in a built environment, and can be used to
compare wayfinding between different environments. The VI provides a way to
measure the ease of wayfinding in a built environment. The VI for a whole terminal,
a subsystemof a terminal or an individual node can be calculated by representing a
transportation terminal as a network of nodes (activity centres) and links (lines of
sight). Higher VIs indicate easier wayfinding and inter-terminal VI comparisons
can also be made. The inclusion of node weightings, the number of signs needed