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Dynamic Message Signs communicate real-time traveler information such as delays
and incidents, allowing travelers to react in a safe, timely, and appropriate
manner. Widely used information dissemination tools that can give information in
the form of what happened, where it happened, and what to expect, Dynamic Message
Signs are also part of the "Amber Alert System" which helps law enforcement recover
abducted children.
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CCTV surveillance allows evaluation of operational freeway characteristics and
confirms traffic conditions by detecting and verifying incidents, and monitoring
levels of congestion.
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Detection devices are used to measure speed and volume so NCDOT can monitor
changes in traffic flow. This information can be shown on a real-time "congestion
map" or used to calculate travel times along certain routes.
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A Roadway Weather Information System is a collection of atmospheric and pavement
sensors used to monitor and identify weather-related events that may be conducive
to hazardous driving conditions, such as wind speed, visibility, road surface
temperature, and air moisture content. RWIS can respond by applying anti-icing
chemicals to the road or activating traveler information devices.
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Reversible Lane Systems enable the maximum use of a roadway by changing the direction
of the individual travel lanes. Lane control signs, displayed well in advance of a
merge, are used to close lanes with lower traffic volume and open additional lanes
for higher volume.
NC SMARTLINK
NC DOT
NC GOV
