Optimal Work Zone Lengths and Signal Timing for Two-Lane Highways Revisited: The Need to Consider Stochasticity

Work zones can give rise to significant costs, both to maintenance agencies as well as road users. In this paper the authors focus on the optimal configuration of work zones on two-lane highways. While previous work all assumed determinism in the vehicle arrival processes, the authors relaxed this questionable assumption and allow vehicles to arrive according to some stochastic process. From the existing literature it is not clear whether such a relaxation would lead to different optimal work zone configurations, as compared to when determinism in the vehicle arrivals is assumed. In this paper the authors demonstrate that work zone configurations based on deterministic queuing theory is no longer optimal in a stochastic environment. Moreover, with the advent of computational power, the authors propose a computationally efficient simulation optimization procedure to determine optimal work zone configurations. In a numerical case study the authors show that significant cost savings can be realized especially when there are multiple work zones and/ or when work zone setup times are long.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: Figures; References; Tables;
  • Pagination: 10p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01154476
  • Record Type: Publication
  • Report/Paper Numbers: 10-2187
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 11:00AM