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To keep things moving, the highway and
surface street network of Los Angeles has become the most instrumented
and managed of any American city. Sensors embedded in the ground
and on poles measure rates and volumes, and deliver their data
to control centers where it is assembled into a dynamic image
of the collective traffic picture in the city. Increasingly
automated, signals also flow out from these control rooms, adjusting
timings of lights at intersections, freeway metering ramps,
dispatching incident response teams, and updating traffic reports,
including live maps on the web. These in turn effect the flow,
feeding back into the system, changing its form, as indicated
by the sensors that send their signals to the control rooms:
the loops feeding back to the loops.
Exhibit credits
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