Overview

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Macroscopic traffic flow model is a mathematical model that formulates the relationships among traffic flow characteristics like density, flow, mean speed of a traffic stream etc. Such models are conventionally arrived at, by integrating microscopic traffic flow models and converting the single-entity level characteristics to comparable system level characteristics. Traffic models are usually made to employ them in computer aided simulations. The method of modeling traffic flow at macroscopic level originated under an assumption that traffic streams as a whole are comparable to fluid streams. The first major step in macroscopic modeling of traffic was taken by Lighthill and Whitham in 1955, when they indexed the comparability of 'traffic flow on long crowded roads' with 'flood movements in long rivers'.

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