Road Transport Systems
ETHZ / D-BAUG / Spring Semester 2021
ETHZ / D-BAUG / Spring Semester 2021
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3.67 (3)
Kartei Details
Karten | 78 |
---|---|
Lernende | 11 |
Sprache | English |
Kategorie | Verkehrskunde |
Stufe | Universität |
Erstellt / Aktualisiert | 20.06.2021 / 06.02.2024 |
Lizenzierung | Keine Angabe |
Weblink |
https://card2brain.ch/box/20210620_road_transport_systems
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Einbinden |
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What is a model?
A set of mathematical equations (or rules) that tries to describe (i.e. replicate) a physical process (e.g. evolution of traffic congestion over time and space)
Why do we need models?
- Process analysis and understanding
- Planning (forecasting)
- introduction of a new mode (multimode)
- modification/extension of infrastructure - Operations (control)
- Design of model-based control strategies
- Estimation/prediction models
- Testing the control performance - Traffic simulation
Classification of traffic models
- Microscopic (mainly for simulation):
car following + lane changing
- Mesoscopic
vehicle platoons with similar characteristics
- Macroscopic
macroscopic traffic variables (in analogy to fluid mechanics --> LWR-Theoy)
- Network (or region) level (MFD)
macroscopic fundamental diagram (regional accumulations, flows)
Traffic flow control - Supply
- Urban traffic lights
- Ramp metering
- Variable speed limits (VSL)
- Variable message signs (VMS)
- Route guidance
Traffic flow control - Demand
- Car pooling
- Congestion pricing
- Mode choice