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To understand simulation, it is important to understand the concept of system state, which is a set of variables that contains enough information to describe the evolution of the system over time. [3] System state can be either discrete or continuous. Traffic simulation models are classified according to discrete and continuous time, state, and ...
Traffic modeling draws heavily on theoretical foundations like network theory and certain theories from physics like the kinematic wave model. The interesting quantity being modeled and measured is the traffic flow , i.e. the throughput of mobile units (e.g. vehicles ) per time and transportation medium capacity (e.g. road or lane width).
An example is the two-fluid model. 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 ...
Car motion: Finally, all cars are moved forward the number of cells equal to their velocity. For example, if the velocity is 3, the car is moved forward 3 cells. These four actions are repeated many times, as long as is required to study any traffic jams that may form. The model is an example of a cellular automaton. The model is for a single ...
PTV Vissim is a microscopic multi-modal traffic flow simulation software package developed by PTV Planung Transport Verkehr AG in Karlsruhe, Germany. It was first developed in 1992. The name is derived from " Verkehr In Städten - SIMulationsmodell " (German for "Traffic in cities - simulation model").
Three-phase traffic theory is a theory of traffic flow developed by Boris Kerner between 1996 and 2002. [1][2][3] It focuses mainly on the explanation of the physics of traffic breakdown and resulting congested traffic on highways. Kerner describes three phases of traffic, while the classical theories based on the fundamental diagram of traffic ...
AnyLogic. AnyLogic is a multimethod simulation modeling tool developed by The AnyLogic Company (formerly XJ Technologies). [4] It supports agent-based, discrete event, and system dynamics simulation methodologies. [5] AnyLogic is cross-platform simulation software that works on Windows, macOS and Linux. [5]
Simulation of Urban MObility (Eclipse SUMO or simply SUMO) is an open source, portable, microscopic and continuous multi-modal traffic simulation package designed to handle large networks. SUMO is developed by the German Aerospace Center and community users. It has been freely available as open-source since 2001, and since 2017 it is an Eclipse ...