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Adaptive Signal Control

QuickFacts

  • Outdated traffic signal timing currently accounts for more than 10 percent of all traffic delays.
  • Adaptive signal control technology effectively reduces traffic congestion, excess fuel consumption, and delays.
  • Whereas traditional signal timing design and maintenance is labor-intensive, adaptive control is handled automatically.
  • Because adaptive signal control technologies use real-time traffic data, they adjust signals to events that cannot be anticipated by traditional time-of-day plans, such as accidents and road construction.
  • When traffic signals are responsive to traffic demands, overall travel times are decreased.
  • Average speeds improve when adaptive signal control technologies are used.
  • Adaptive signal control typically improves travel time and delay by 10 percent.
  • Within the United States, adaptive signal control technologies have been in use for roughly 20 years, though they have been deployed on less than 1 percent of existing traffic signals.

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Page last modified on August 12, 2013.
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000