An amazing two-lane traffic simulation from Dr. Martin Treiber.
Who was not yet amazed by traffic jams or stop-and-go waves, seemingly appearing “out of nothing”, without any obvious cause? We investigate these instabilities and other aspects of nonlinear traffic dynamics by developing and simulating mathematical models: Microscopic traffic models describe the motion of each individual vehicle.
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You will see, how the interplay of perturbations and bottlenecks together with a high traffic flow will cause various types of traffic breakdowns.
(via: Ryan May)