On the Impact of the Capacity Drop Phenomenon for Freeway Traffic Flow Control

  title={On the Impact of the Capacity Drop Phenomenon for Freeway Traffic Flow Control},
  author={Michael E. Cao and Gustav Nilsson and Samuel D. Coogan},
  journal={2021 IEEE Conference on Control Technology and Applications (CCTA)},
Capacity drop is an empirically observed phenomenon in vehicular traffic flow on freeways whereby, after a critical density is reached, a state of congestion sets in, but the freeway does not become decongested again until the density drops well below the critical density. This introduces a hysteresis effect so that it is easier to enter the congested state than to leave it. However, many existing first-order models of traffic flow, particularly those used for control design, ignore capacity… 

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