Chapter
Apr 26, 2012
The Relationship of Speed-Flow-Density for the Mix Traffic Flow on Beijing Urban Expressway
Authors: Yue Li [email protected], Huapu Lu [email protected], Changzhi Bian [email protected], and Xinxin Yu [email protected]Author Affiliations
Publication: International Conference on Transportation Engineering 2009
Abstract
According to the intra-vehicle interaction, a generalized speed-flow relationship of highway consists of three regime including an congested part, a queue discharge and within the queue. Different from the highway speed-flow-density relationship, the urban expressway has more complicate characteristics. Based on one month serial data collected from loop detectors on different sites of the expressway in Beijing, we find the relationship of speed flow and density changes remarkably during different period of time. So a more appropriate way to explore speed-flow-density relationship is to research it under different period of time. This paper will establish a speed-flow-density model during nighttime and daytime separately, and analyze the key point of K-V, K-Q and Q-V curves.
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© 2009 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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ASCE Technical Topics:
- Data collection
- Density currents
- Engineering fundamentals
- Equipment and machinery
- Fluid dynamics
- Fluid mechanics
- Highway and road management
- Highway transportation
- Highways and roads
- Hydrologic engineering
- Infrastructure
- Methodology (by type)
- Probe instruments
- Research methods (by type)
- Traffic congestion
- Traffic engineering
- Traffic flow
- Traffic management
- Traffic speed
- Transportation engineering
- Urban and regional development
- Urban areas
- Water and water resources
Authors
Affiliations
Institute of transportation, Tsinghua University, Beijing, China, 100084. E-mail: [email protected]
Institute of transportation, Tsinghua University, Beijing, China, 100084. E-mail: [email protected]
Institute of transportation, Tsinghua University, Beijing, China, 100084. E-mail: [email protected]
Institute of transportation, Tsinghua University, Beijing, China, 100084. E-mail: [email protected]
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