This paper presents some applications of the discrete-time point process theory, time-varying Markov chain and Martingale Difference (MD) sequence in urban traffic computer control system. In this paper we propose an approach to discrete the place of arriving vehicles in front of the intersection, depending on their speed distributions. Furthermore, the formation and dispersion of real queues at traffic signal is then modeled by a time-varying Markov chain which is related to the observation data from vehicle detectors in the intersection. Some results in the theory of discrete time point process are then used to derive a new nonlinear minimum error variance algorithm to predicte the state of queues in the model. At same time, we present a method to determine the time-varying unknown parameters of the algorithm. The new algorithm was tested in comparison with the previous ones by simulation. Some results of the test are shown. They indicated that an apparent better performance than those of previous ones is achieved. We have set up an optimal control system based on a micro-computer in one main street in Dalian City, China using the approach presented in this paper. And a satisfactory performance was obtained.
A new algorithm for state estimator of queue in urban traffic computer control system
Ein neuer Algorithmus fuer die Zustandsschaetzung von Fahrzeugschlangen in einem Computerkontrollsystem fuer den Stadtverkehr
Digital Computer Applications to Process Control. Proc. of the 7th IFAC, IFIP, IMACS Conf. ; 423-428
1986
6 Seiten, 5 Bilder, 1 Tabelle, 7 Quellen
Aufsatz (Konferenz)
Englisch
Backpressure control with estimated queue lengths for urban network traffic
DOAJ | 2021
|Backpressure control with estimated queue lengths for urban network traffic
Wiley | 2021
|Traffic State Estimation for Urban Road Networks Using a Link Queue Model
Transportation Research Record | 2017
|Modeling Real-Time Dynamic Queue Length for Urban Traffic Control Systems
British Library Conference Proceedings | 1994
|Discrete-time point processes in urban traffic queue estimation
Tema Archiv | 1979
|