Optimizing Work Zones for Two-Lane Highway Maintenance ProjectsAuthor/Presenter: Chien, Steven; Tang, Yimin; Schonfeld, Paul
Highway maintenance is very expensive in terms of not only costs to the responsible agencies but also disruptive delays to users. Construction and maintenance activities on two-lane two-way highways often require the closure of one lane. During certain periods of a day, the user delay associated with lane closure may be quite intolerable to motorists. A numerical method is developed to optimize work-zone scheduling and traffic control on two-lane two-way highways where one lane at a time is closed. The objective is to minimize the total cost, including maintenance, labor/equipment idle, and user-delay costs, considering traffic flows varying over time. The optimized variables (e.g., work-zone lengths and cycle times) and the sensitivity results generated from a numerical example are presented in this study.