THE LAGGED CELL-TRANSMISSION MODEL

In cell-transmission models of highway traffic one partitions a highway into small sections (cells) and keeps track of the cell contents (number of vehicles) as time passes. The record is updated at closely spaced instants (clock ticks) by calculating the number of vehicles that cross the boundary separating each pair of adjoining cells during the corresponding clock interval. This paper shows that the accuracy of the cell-transmission approach is enhanced if the downstream density that is used to calculate the receiving flow(s) is read L clock intervals earlier than the current time, where L is a non-negative integer that should be chosen by means of a simple formula. The rationale for the introduction of this lag is explained in the paper. The lagged cell-transmission model is related (but not equivalent) to both Godunov's first order method for general flow-density relations and Newell's exact method for concave flow-density relations. It is easier to apply and more general than the latter, and more accurate than the former.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0080434487
• Corporate Authors:

  Elsevier

  The Boulevard, Langford Lane
  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Daganzo, C F
• Conference:
  • 14th International Symposium on Transportation and Traffic Theory
  • Location: Jerusalem, Israel
  • Date: 1999-7-20 to 1999-7-23
• Publication Date: 1999

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 81-104

Subject/Index Terms

• TRT Terms: Accuracy; Time lag; Traffic density; Traffic flow; Traffic models
• Uncontrolled Terms: Flow-density relation (Traffic); Lagged cell-transmission models
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00794621
• Record Type: Publication
• ISBN: 0080434487
• Files: TRIS, ATRI
• Created Date: Jun 1 2000 12:00AM