Chapter 5 _1_

Chapter 5 _1_ - Traffic Flow Theory: History and Models...

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Traffic Flow Theory: History and Models Theoretical description of the characteristics of vehicle movements on roadways
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ECI 161 Winter 2012 2 Need for traffic flow models Traffic-flow theories, seek to describe in a precise mathematical way, the interactions among vehicles, drivers, and the infrastructure. Why do we need them? Photo source: http://starbulletin.com/2004/02/21/news/wi ld.html
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ECI 161 Winter 2012 3 Water and Particle Flow: forces of nature River flow Particle flow:3D
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ECI 161 Winter 2012 4 Traffic Flow: Human & Nature Fish traffic Vehicular traffic stream
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ECI 161 Winter 2012 5 Outline s Traffic Flow Models s Traffic parameters s Traffic stream models
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ECI 161 Winter 2012 6 Traffic Stream Parameters s Traffic Flow s Speed s Density s Headway s Parameter Relationships
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7 Traffic Flow Rate s Traffic flow is defined as the number of vehicles (n) passing some designated roadway point in a given time interval (t): s Units are typically vehicles/hour (called Volume if measured in 1 hour) s In practice, the analysis flow rate is usually based on the 15-minute flow within the hour of interest. t
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This note was uploaded on 03/10/2012 for the course ECI 161 taught by Professor Tafazzoli during the Winter '12 term at UC Davis.

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Chapter 5 _1_ - Traffic Flow Theory: History and Models...

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