Agent-Based Transport Simulations
MATSim provides a framework to implement large-scale agent-based transport simulations. The framework consists of several modules which can be combined or used stand-alone. Modules can be replaced by custom implementations to test single aspects of your own work.
Currently, MATSim offers a framework for demand-modeling, agent-based mobility-simulation (traffic flow simulation), re-planning, a controler to iteratively run simulations as well as methods to analyze the output generated by the modules.

Key Features of MATSim
Fast Dynamic and Agent-Based Traffic Simulation
Simulate whole days within minutesPrivate and Public Traffic
Both private cars and transit traffic can be simulatedSupports Large Scenarios
MATSim can simulate millions of agents or huge, detailed networksVersatile Analyses and Simulation Output
E.g. compare simulated data to real-world counting stationsModular Approach
Easily extended with your own algorithmsOpen Source
You get the Java Source Code, which runs on all major operating systemsActive Development
The international MATSim community constantly adds new features and improves current onesStart using MATSim!
To learn more, look at the documentation or at the scenario gallery to see how others use MATSim.