APPROXIMATE DELAYS CAUSED BY LOCK SERVICE INTERRUPTIONS

The lock structures in the inland waterway system have become major constraints to navigation as a result of increased traffic and facility deterioration, leading to costly delays. Most of the locks have exceeded their design life, and service interruptions occur quite frequently, causing increasing delays to traffic. Hence, a reliable model is necessary to estimate the delay caused by lock service interruptions. In this paper, a model is developed in the form of one relatively simple equation to estimate tow delays caused by a single lock service interruption. A basic equation is derived on the basis of continuous flow theory. Because the waterway flows consist of discrete vessels, an appropriate discrete adjustment factor is developed. To account for the stochastic characteristics of actual waterway operations, an adjustment factor is estimated statistically from simulation results. The resulting model provides accurate estimates of delays far more quickly and inexpensively than simulation. The simple model developed in this paper should be useful in future studies of capacities, delays, service reliability, maintenance policies, and general waterway economics.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 41-49
  • Monograph Title: Freight transportation research
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00662915
  • Record Type: Publication
  • ISBN: 0309055083
  • Files: TRIS, TRB
  • Created Date: Jul 28 1994 12:00AM