From Transit Systems to Models: Data Representation and Collection

This chapter deals with the data that form input and output of passenger route choice models. All information about supply and demand that is relevant for passenger route choice must be captured in a formal way in order to be accessible to mathematical choice models. Over time standard conventions for this formalization have emerged. In order to avoid repetition in Part 3 they are presented once in Section 5.1. Similarly Section 5.2 formalizes the output of route choice models as quantitative indicators which are then fed back into higher-level decision models and ultimately into the evaluation of different investment options. Finally, Section 5.3 reviews real-world data sources from which either model input can be extracted or against which model output can be compared for validation and calibration. Here the impact of ITS is particularly visible, as availability, diversity and volume of data have increased rapidly.