Multiclass Traffic Flow Dynamics: An Endogenous Model
| Autor: | Kai Yuan, Hong Kam Lo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
050210 logistics & transportation
Computer science 05 social sciences Dynamics (mechanics) Traffic simulation Transportation 010501 environmental sciences Traffic flow 01 natural sciences Set (abstract data type) Control theory Overtaking 0502 economics and business 0105 earth and related environmental sciences Civil and Structural Engineering |
| Zdroj: | Transportation Science. 55:456-474 |
| ISSN: | 1526-5447 0041-1655 |
| Popis: | Vehicles on roads can be distinguished, each defined by its own set of properties (e.g., fleet length and free-flow speed). The traffic states on roads can be attributed to the longitudinal heterogeneity in vehicles. Vehicles slower than prevailing vehicles are defined as moving bottlenecks. On a multilane road section with multiple vehicle types, slower vehicles create moving bottlenecks and induce overtaking by faster vehicles so as to maintain their higher desired speed. The influence of single-class moving bottlenecks has been studied in the past. However, the impacts of multiple classes of moving bottlenecks have not yet been fully explored. This paper categorizes vehicles into passenger cars, medium trucks, and heavy trucks. By defining medium trucks and heavy trucks as moving bottlenecks, we develop analytical formulas for the fundamental diagram on a multilane road section with heterogeneous moving bottlenecks. The formula confirms that the composition of traffic and the longest truck platoon length influence the fundamental diagram. We then conduct simulations using a first-order kinematic wave model in Lagrangian coordinates to validate the fundamental diagram developed with the analytical formula and obtain promising results. This study provides fundamental knowledge for multiclass traffic modeling and multilane traffic operations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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