Traffic conditions at adjacent intersections
tend to interact with each other, so it can make a big
difference when we examine nearby intersections together
instead of individually.
We use a variety of traffic simulation software programs
to model these interactions and portray traffic conditions
as accurately as possible. |
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Here is an example of a simple simulated network.
It includes just a few of the kinds of traffic features we
can simulate, such as:
• A signalized intersection (shown with the red/yellow/green
circles)
• An unsignalized intersection (shown with the red octagon
stop sign)
• A multi-leg roundabout (shown with the red/white triangles
and an inner green circle)
 The
model yields typical traffic engineering calculations (such
as travel delay and maximum queue lengths) and also shows
many features visually: lane uses (for left turns, going straight
through, or right turns), how long it takes queues to dissipate,
the percentages of trucks (larger vehicles), and what kind
of movements drivers are making (shown by the different vehicle
colors - see the key picture):
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