Abstract
The proportionality condition has been widely used to produce a unique path flow solution in the user equilibrium traffic assignment problem. However, it remains an open question whether and to what extent this condition accords to real travel behavior. This paper attempts to validate the behavioural realism of the proportionality condition using more than 27 million route choice observations obtained by mining a large taxi trajectory data set. A method is first developed to uncover more than three hundred valid paired alternative segments (PAS), on which the proportionality condition is tested by performing linear regression analysis and chi-square tests. The results show that the majority of the PASs tested (up to 85%) satisfy the proportionality condition at a reasonable level of statistical significance.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 583-601 |
| Number of pages | 19 |
| Journal | Transportation Research Part B: Methodological |
| Volume | 104 |
| DOIs | |
| State | Published - Oct 2017 |
Funding
The work was conducted when the first author visited Northwestern University as a visiting postdoctoral researcher. He was funded by Chinese National Nature Science Foundation (Grant NO. 71501129) and Chinese International Postdoctoral Exchange Fellowship Program (NO. 20150045). The work was also partially funded by the United States National Science Foundation under the award number CMMI-1402911. We wish to thank Mr. Jiandong Qiu from Shenzhen Urban Transport Planning Center for providing the COST data used in this study.
Keywords
- Paired alternative segments
- Taxi trajectory data
- The proportionality condition
- User equilibrium
ASJC Scopus subject areas
- Civil and Structural Engineering
- Transportation
