Network Flow Constraints and Definitions of Travel Times

  • Bin Ran
  • David Boyce


In this chapter, the constraints for dynamic traffic necessary for a urban transportation network are presented. These constraints include flow conservation for links and nodes, flow propagation, first-in-first-out (FIFO) and oversaturation. Associated with these constraints and different needs for dynamic travel time information, two definitions of travel time are considered.


Travel Time Exit Flow Link Flow Link Travel Time Travel Time Function 
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Copyright information

© Springer-Verlag Berlin · Heidelberg 1996

Authors and Affiliations

  • Bin Ran
    • 1
  • David Boyce
    • 2
  1. 1.Department of Civil and Environmental EngineeringUniversity of Wisconsin at MadisonMadisonUSA
  2. 2.Urban Transportation CenterUniversity of Illinois at ChicagoChicagoUSA

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