Introducing EDDEE – Event Detection and Delay Estimation Engine

The National Traffic Control Center (NTCC) in England is developing, prototyping and planning the introduction of an advanced Event Detection and Delay Estimation Engine (EDDEE) at the National Traffic Control Centre. At present abnormal congestion alerts are raised when the journey time on a section of the network increases significantly above expected for that time of day and day type; this has many disadvantages. Using changes in flow to detect incidents can overcome these problems with the additional benefit that there are four times more flow measurement sites than journey time sections, so using flow sites would result in better geographic granularity. EDDEE uses real-time raw traffic flow counts to identify the start and end of congestion and capacity reducing events. This involves comparing the flow rates at upstream and downstream loop-based monitoring sites. EDDEE calculates when an event starts, based on the stress (the ratio of the flow rate at the upstream site to the capacity of the road) and the difference between the downstream and upstream flow rates.


  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures;
  • Pagination: 5p
  • Monograph Title: ITS in Daily Life

Subject/Index Terms

Filing Info

  • Accession Number: 01148342
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 20 2010 12:51PM