Adaptive Controllers

• Distributed or Centralized architecture.

  • Schedule fixed-time controllers.
  • Demand-responsive systems.
  • Integration with Traffic Assignment.

• Off/On-line optimization/implementation.

  • Different phases, update frequency.
  • Optimization index / control parameters.
  • Traffic prediction.
  • Queue analysis, shock wave analysis, dynamic programming.

• Examples: SCATS(‘79), SCOOT(‘81),OPAC(‘90).

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