Work Zone Capacity Estimation: An Analytical Review

Understanding traffic flow parameters within short-and long-term work zones is imperative for the evaluation of work zone traffic impact. Knowledge of these parameters will facilitate the reduction of traffic impact and help formulate effective strategies to manage construction and maintenance activities on the nation’s heavily traveled highways. Much research has focused on the subject with varying degrees of success. Researchers have proposed several models to estimate work zone capacity with certain limitations. This paper reviews the efforts so far on the subject including definitions, basic concepts of work zone capacity and various capacity estimation models. Different prevailing views on both conceptual and operational issues are discussed. This paper focuses on issues such as the classification of work zones, the basis for measuring capacity as mean queue discharge versus maximum flow, and the choice to measure work zone capacity at the end of the transition area or in the activity area. Despite the diversity of views, this work has found that mean queue discharge is more rational and standardization of work zone classification is necessary for uniformity. Weather conditions, the driver population and the effect of heavy vehicles and grade emerged as the most influential factors for estimation of work zone capacity. With regional similarities, these factors provide a strong basis for a regional work zone capacity estimation model.


  • English

Media Info

  • Media Type: DVD
  • Features: References; Tables;
  • Pagination: 20p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01152204
  • Record Type: Publication
  • Report/Paper Numbers: 10-4041
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 12:04PM