An eye on traffic (The State)

[Rotor_Head]

ATLANTA â€â€￾ Tracking traffic can be an expensive business. In some places, costly cameras and radar systems are mounted high above highways to watch traffic at strategic points. Transportation agencies also dig up roads to install sensors that monitor the flow. And helicopters roam the skies of the busiest cities, relaying information on the choked roadways to media outlets.

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