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Evolving and Phasing Out Legacy ITS Devices and Systems

Transportation agencies across the country have deployed numerous Intelligent Transportation Systems (ITS) devices and systems, some of which have been in place for more than 25 years. As technology changes, it is important to evaluate these "legacy" devices and systems to determine if needs have changed; whether these devices and systems should be replaced, reused, or evolved in other ways; or whether it is beneficial to continue their operation.

The ENTERPRISE Pooled Fund Study conducted this research to help increase members' understanding of agency practices for evolving and phasing out ITS devices and systems. This project documented nearly 60 case studies, including decision factors, criteria, approaches, and tools transportation agencies use to help guide decision-making when evolving and phasing out ITS devices and systems. Based on the case studies, a set of criteria and applicable tools was developed for ten common ITS devices and systems. These criteria are intended to assist agencies with identifying and navigating through multiple considerations while assessing ITS devices and systems to determine potential evolutions or eliminations. In addition, multiple overarching tools used by agencies to guide decisions for managing ITS devices and systems were documented.

 

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