This volume aims to fulfills a need for a single text which documents the theoretical foundations of travel choice modelling. Divided into three parts - microeconomic theory, behavioral decision theory and statistical theory - this text extends approaches to travel choice modelling beyond the consumer theory developed in economics by applying theories from the fields of geography, psychology and statistics, and in doing so addresses two fundamental questions: what are the theoretical foundations of travel choice modelling and what should they be? Containing 20 specially-commissioned chapters, this book represents the latest and best thinking in this rapidly expanding field. Activity-based and dynamic approaches are fast emerging as the state-of-the-art in transport modeling and are replacing trip-based models.