Abstract
Since the passage of the Intermodal Surface Transportation Efficiency Act in 1991, a significant number of state highway agencies have started to develop and implement statewide travel demand models to meet policy and legislative development needs. Currently, however, a lack of up-to-date multimodal and inter-regional passenger travel data hampers analysts’ ability to conduct quantitative assessments of long-distance travel infrastructure investment needs, at both the national and statewide levels. Despite these data limitations, but also largely shaped by them, long-distance travel modelling has become an increasingly popular topic in recent years. This paper reviews several methodologies for multimodal inter-regional travel demand estimation, drawing examples from both state-specific modelling within the USA and from fully national models being developed and applied in other parts of the world, notably in Europe.
Acknowledgement
This research was supported in part by the US Department of Transportation (USDOT), Federal Highway Administration (FHWA). The opinions in this document do not necessarily reflect the official views of USDOT and FHWA. USDOT and FHWA assume no liability for the content or use of this document. The authors are solely responsible for all statements in this paper.