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Construction zones often cause considerable inconveniences in highway traffic. They are often in the form of the closure of one or more lanes. Two major effects of these lane closures are traffic delays and safety hazards to drivers. The objective of this research is to study the traffic behavior at freeway work zones and come up with recommendations for the control procedures at such sites. This goal has been accomplished through completion of two tasks: 1) Development of a microscopic traffic simulation model to reflect the actual traffic flow patterns at and upstream from the construction site. 2) Validation of the model by means of data collection and comparison of the results with those of the model for a number of dtiferent traffic volumes. The data was used not only to test the microscopic traftlc behavior, but the macroscopic as well, and in both easesthe results were satisfactory. The model was then used as a means of experimentation to reach an optimum location for a control sign to result in the minimum traffic delay.

A simulation study of traffic control procedures at highway work zones