Using systems dynamics modelling to facilitate sustainable decision making and improved planning and implementation of integrated public transport networks (IPTN) as effective spatial transformation instruments in South African cities

Abstract

Integrated Public Transport Networks (IPTNs) can contribute positively towards spatial transformation. The rate at which this is feasible is contingent upon the nature of decisions made by planning agencies, households, and businesses. The paper demonstrates the use of a systems dynamics modelling platform to simulate the dynamic fusion of decisions (and non-decisions) by the various role players who influence the performance of IPTNs, as well as the effect of their decisions on the performance trajectory of IPTNs as spatial transformation instruments in South African cities. The research demonstrates that underestimating and mismanaging the inherent interdependencies of the decisions made by the actors in the development and execution of IPTNs can have a substantial impact on the rate of spatial transformation. In order to turnaround the sustainability trajectory, a city will need to investigate various interventions while turning an eye out for any unintended consequences of decisions and the prospective repercussions of the interventions. In this sense, the model turns into a tool for facilitating discussions among stakeholders who are interested in the results.