VISSIM 5.30-05 User Manual

1.2 The Traffic Simulation Model
The Traffic Simulation Model
The simulation package VISSIM consists internally of two different parts,
exchanging detector calls and signal status through an interface. The
simulation generates an online visualization of traffic operations and offline
the generation of output files gathering statistical data such as travel times
and queue lengths.
The traffic simulator is a microscopic traffic flow simulation model including
the car following and lane change logic. The signal state generator is a
signal control software polling detector information from the traffic simulator
on a discrete time step basis (down to 1/10 of a second). It then determines
the signal status for the following time step and returns this information to the
traffic simulator.
Communication between traffic simulator and signal state generator
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