Coordinated road-junction traffic control by dynamic programming

Tsin Hing Heung, Tin Kin Ho, Yu Fai Fung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

52 Citations (Scopus)


This paper presents a novel approach to road-traffic control for interconnected junctions. With a local fuzzy-logic controller (FLC) installed at each junction, a dynamic-programming (DP) technique is proposed to derive the green time for each phase in a traffic-light cycle. Coordination parameters from the adjacent junctions are also taken into consideration so that organized control is extended beyond a single junction. Instead of pursuing the absolute optimization of traffic delay, this study examines a practical approach to enable the simple implementation of coordination among junctions, while attempting to reduce delays, if possible. The simulation results show that the delay per vehicle can be substantially reduced, particularly when the traffic demand reaches the junction capacity. The implementation of this controller does not require complicated or demanding hardware, and such simplicity makes it a useful tool for offline studies or real-time control purposes.

Original languageEnglish
Pages (from-to)341-350
Number of pages10
JournalIEEE Transactions on Intelligent Transportation Systems
Issue number3
Publication statusPublished - Sept 2005


  • Coordination
  • Dynamic programming (DP)
  • Fuzzy-logic control (FLC)
  • Road-traffic control

ASJC Scopus subject areas

  • Automotive Engineering
  • Mechanical Engineering
  • Computer Science Applications


Dive into the research topics of 'Coordinated road-junction traffic control by dynamic programming'. Together they form a unique fingerprint.

Cite this