Abstract
Forecasts of personal travel support significant planning decisions concerning transportation infrastructure investment and travel demand management policies, as well as major land use changes. This paper reviews the fundamental methodologies that have been developed for urban travel forecasting practice since 1950s. We first describe the conventional four-step sequential procedure with feedback loops, but focus on the mathematical formulations of user equilibrium traffic assignment. We then show how the equilibrium concept and its formulation lead to combined models that internalize the interactions represented by feedback loops in the four-step model. We conclude this paper with remarks on directions for future research in this field.
| Original language | English (US) |
|---|---|
| Title of host publication | International Encyclopedia of Transportation |
| Subtitle of host publication | Volume 1-7 |
| Publisher | Elsevier |
| Pages | 432-439 |
| Number of pages | 8 |
| Volume | 4 |
| ISBN (Electronic) | 9780081026724 |
| ISBN (Print) | 9780081026717 |
| DOIs | |
| State | Published - Jan 1 2021 |
Keywords
- Combined model
- Feedback
- Four-step model
- Mode choice
- System optimal
- Traffic assignment
- Travel forecasting
- Trip distribution
- Trip generation
- User equilibrium
ASJC Scopus subject areas
- General Social Sciences
