Off-Ramp Coupling Conditions Devoid of Spurious Blocking and Re-Routing

When modeling vehicular traffic flow on highway networks via macroscopic models, suitable coupling conditions at the network nodes are crucial. Frequently, the evolution of traffic flow on each network edge is described in a lane-averaged fashion using a single-class Lighthill-Whitham-Richards model. At off-ramps, split ratios (i.e., what percentage of traffic exits the highway) are prescribed that can be drawn from historical data. In this situation, classic FIFO coupling conditions yield unrealistic results, in that a clogged off-ramp yields zero flux through the node. As a remedy, non-FIFO conditions have been proposed. However, as we demonstrate here, those lead to spurious re-routing of vehicles. A new coupling model, FIFO with queue (FIFOQ), is presented which preserves the desirable properties of non-FIFO models while not leading to any spurious re-routing.

• Record URL:
  https://doi.org/10.1177/0361198118792997
• Record URL:
  https://doi.org/10.1177/0361198118792997
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
• Authors:
  • Salehi, Najmeh
  • Somers, Julia
  • Seibold, Benjamin
• Publication Date: 2018

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 12-24
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Volume: 2672
  • Issue Number: 20
  • Publisher: Sage Publications, Incorporated
  • ISSN: 0361-1981
  • EISSN: 2169-4052
  • Serial URL: http://journals.sagepub.com/home/trr

Subject/Index Terms

• TRT Terms: Highways; Macroscopic traffic flow; Network nodes; Networks; Off ramps; Queuing; Routing; Traffic congestion; Traffic data; Traffic models
• Identifier Terms: Lighthill-Whitham-Richards traffic flow model
• Uncontrolled Terms: Coupled flow theories; Rerouting
• Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting;

Filing Info

• Accession Number: 01661048
• Record Type: Publication
• Report/Paper Numbers: 18-05222
• Files: TRIS, TRB, ATRI
• Created Date: Feb 23 2018 4:37PM