Day-to-day approach in the analysis of transit system: the case of two runs

In the sphere of transit system assignment, the dynamic process models are
receiving an increasing interest due to the necessity to explicitly simulate the
system dynamics. The aim of this paper is to evaluate link flows and networks
performances, such as travel times and levels of service, in day-to-day dynamics.
In this paper the formulation of the modal split model, given by Nuzzolo and
Russo [5], is recalled, stressing the dependency of whitin-day and day-to-day
dynamics of the transit service. The modal split is influenced by the day-to-day
learning components, like in the private transportation systems [3, 41. Once
identified some components subject to day-to-day modification [7], some
examples of system dynamics according to different supply evolution typologies
are introduced. An analysis of the weight of the control parameters in the
dynamic process is developed, considering the stability system conditions.