Because of recent advances in our understanding of dynamic, non-linear structure formation (so-called dissipative structures) and in our ability to represent these mathematically ( using bifurcation analysis), it is now becoming possible to explore the evolution and stability of complex systems to internal and external changes. This paper will explore the urban/regional transportation system by examining the interaction between different transportation policies an urban/regional structure with the aid of dynamic models based on the concept of dissipative structures and self-organizing systems. Such models are constructed by characteristic behaviours as well as mechanism of interaction. The influence of the unexpected, such as population variations and economic innovations are important aspects of these models as they may profoundly affect system structure (illustrating the concept of "order through fluctuation"). Because of this, no one "optimised" urban or regional system exists, rather, many are possible depending upon history. However, systems are considerably more sensitive to the influence of innovations and to the kind and size of a policy initiative at different times in its history ( near its bifurcation points). The paper will provide examples of how the models have been used to explore the examples of how the models have been used to explore the influence of timely ( tough hypothetical) transportation policy mobility and access of the region's different population groups. (A)
Samenvatting