Freeway traffic flow control by lumped parameter system approach


Akbas A., Ergun M.

INDIAN JOURNAL OF ENGINEERING AND MATERIALS SCIENCES, cilt.13, ss.322-332, 2006 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 13 Konu: 4
  • Basım Tarihi: 2006
  • Dergi Adı: INDIAN JOURNAL OF ENGINEERING AND MATERIALS SCIENCES
  • Sayfa Sayısı: ss.322-332

Özet

Freeway traffic flows can be controlled by lumped parameter system approach owing to the space discretized system models. Such a control model incorporating a coordinated ramp metering mechanism is proposed in this study. The non-linear state equations representing the traffic system dynamics are derived from the conservation law in difference equations form. The control model is obtained by a feedback linearization approach, so that the target density of the controller is chosen as the critical density of the traffic system. Simulation based test studies have been done in a VISSIM simulation environment in order to compare the data obtained by the shock wave modified feedback linearization method to the non-modified type, with respect to the uncontrolled system performance. Test results show that the main-link flow performance is increased sufficiently by the proposed control model.