Path Size Modeling in Multimodal Route Choice Analysis

Abstract

Travelers in multimodal networks make many choices (e.g., main mode, access modes, egress modes, boarding nodes, transfer nodes, and egress nodes). One way to address this complexity of choices is to analyze choice sets of multimodal routes. However, choice sets for multimodal networks are large, and of routes within choice sets is substantial. This paper focuses on in multimodal transport networks. An overview of the topic of and route choice modeling is given and is followed by an analysis of how might be defined in the context of multimodal networks. Three definitions of overlap are proposed, based on number of legs, time, or distance. The different definitions are analyzed using logit estimations, which show that must be accounted for. Furthermore, the definition of path size for multimodal transport networks should be different from that used for road networks: for multimodal transport networks, a definition using number of legs yields substanti...