A restricted branch and bound approach for setting the left turn phase sequences in signalized networks

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The main objective of synchronized signal timing is to keep traffic moving along arterial in platoons throughout the signal system by proper setting of left turn phase sequence at signals along the arterials/networks. The synchronization of traffic signals located along the urban/suburban arterials in metropolitan areas is perhaps one of the most cost-effective method for improving traffic flow along these streets. The popular technique for solving this problem formulates it as a mixed integer linear program and used Land and Powell branch and bound search to arrive at the optimal solution. The computation time tends to be excessive for realistic ... continued below

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19 p.

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Pillai, R.S.; Rathi, A.K. & Cohen, S. July 1, 1994.

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  • Pillai, R.S.
  • Rathi, A.K. Oak Ridge National Lab., TN (United States)
  • Cohen, S. Federal Highway Administration, McLean, VA (United States). Turner Fairbanks Highway Research Center

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Description

The main objective of synchronized signal timing is to keep traffic moving along arterial in platoons throughout the signal system by proper setting of left turn phase sequence at signals along the arterials/networks. The synchronization of traffic signals located along the urban/suburban arterials in metropolitan areas is perhaps one of the most cost-effective method for improving traffic flow along these streets. The popular technique for solving this problem formulates it as a mixed integer linear program and used Land and Powell branch and bound search to arrive at the optimal solution. The computation time tends to be excessive for realistic multiarterial network problems due to the exhaustive nature of the branch and bound search technique. Furthermore, the Land and Powell branch and bound code is known to be numerically unstable, which results in suboptimal solutions for network problems with a range on the cycle time variable. This paper presents the development of a fast and numerically stable heuristic, developed using MINOS linear programming solver. The new heuristic can generate optimal/near-optimal solutions in a fraction of the time needed to compute the optimal solution by Land and Powell code. The solution technique is based on restricted search using branch and bound technique. The efficiency of the heuristic approach is demonstrated by numerical results for a set of test problems.

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19 p.

Notes

OSTI as DE95014286

Source

  • 74. annual Transportation Research Board meeting, Washington, DC (United States), 11-15 Jan 1995

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  • Other: DE95014286
  • Report No.: CONF-950193--2
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 83862
  • Archival Resource Key: ark:/67531/metadc785073

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  • July 1, 1994

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • Jan. 20, 2016, 6:17 p.m.

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Pillai, R.S.; Rathi, A.K. & Cohen, S. A restricted branch and bound approach for setting the left turn phase sequences in signalized networks, article, July 1, 1994; Tennessee. (digital.library.unt.edu/ark:/67531/metadc785073/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.