Fiber networks can carry huge amounts of data very quickly. For traffic, this means signals can change in real time to reduce jams. Sensors on roads, bridges, and intersections send live updates through fiber cables. Traffic centers use this data to redirect cars, prevent bottlenecks, and make daily commuting smoother.

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https://www.sociomix.com/c/stories/from-traffic-flow-to-pollution-fiber-optics-transform-cities/1760003128