In areas without an existing Intelligent Transportation System (ITS) infrastructure, ITSmeasures are still among the most effective in reducing delays and excess emissionsassociated with construction projects. The Architecture Subsystem Interconnect Diagram1(Figure 1) in the United States National Architecture Standards is an effective tool to quicklydetermine the packages that can be implemented prior to construction startup and that wouldbe cost-effective in addressing delays and the effects of construction-related incidents. Apublication from the U.S. Department of Transportation states:A lot of time and effort went into developing the National ITSArchitecture—for a very good reason—to make the process ofdesigning and implementing these systems easier for you. Youcan save staff hours and engineering design costs by using it.2This paper presents three case studies of implementation using the National ITS Architecturefor construction projects that vary in size, complexity, and actual ITS elements implemented.The success and cost-effectiveness of each element is discussed. Also discussed are nontechnicalissues that affected the success of the implementation. Use of the ArchitectureSubsystem Interconnect Diagram did indeed greatly reduce planning hours and costs byenabling rapid determination of feasible elements for work zone incident management.
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