What Have We Learned about Intelligent Transportation Systems? [Complete report]

Sussman, Joseph M.; Pearce, Vincent; Hicks, Brandy; Carter, Mark; Lappin, Jane E.; Casey, Robert; Orban, John E.; McGurrin, Michael; DeBlasio, Allan J · 2000 · ROSA P / United States. Federal Highway Administration

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Summary

This report evaluates the status and effectiveness of Intelligent Transportation Systems (ITS) in the United States more than a decade after the launch of the National ITS Program. Motivated by the increasing difficulty of expanding transportation capacity through conventional infrastructure, the study aims to determine which ITS technologies and applications have been successfully deployed, which have failed, and what lessons can guide future development. The research focuses on seven key areas: freeway and incident management, arterial management, traveler information systems, advanced public transportation, commercial vehicle operations, and cross-cutting technical and institutional issues. The methodology relied on a synthesis of existing data and expert consensus rather than new primary data collection. The authors utilized databases maintained by the ITS Joint Program Office, including deployment tracking databases for metropolitan areas, transit agencies, and commercial vehicles, as well as cost databases. Success was defined by effectiveness in addressing societal goals (such as safety and congestion reduction) and market-driven deployment levels. The study categorized technologies as successful, unsuccessful, holding promise, or having an inconclusive status. To validate findings, the team conducted expert workshops in December 1999 and April 2000, engaging industry professionals and stakeholders to review initial results and identify barriers to deployment, such as technical failure, excessive cost, or institutional obstacles. The findings indicate that while many ITS technologies have achieved widespread deployment, significant challenges remain. Technically, off-the-shelf hardware and software are generally sufficient, meaning technology quality is not a primary barrier to deployment. However, specific algorithmic issues persist, such as the poor performance of adaptive traffic control algorithms under heavy traffic conditions. The most significant barriers are institutional. The report identifies ten prominent institutional issues, including lack of awareness, insufficient long-term operations funding, procurement difficulties, and privacy concerns. A major finding is the lack of integration among ITS components; many deployments are stand-alone applications rather than cohesive systems. For instance, advanced transportation management systems and traveler information systems have developed independently, limiting their combined effectiveness. Additionally, interoperability issues, such as incompatible electronic toll collection devices across regions, hinder widespread utility. The significance of this report lies in its conclusion that the future of ITS depends less on technological innovation and more on institutional reform and system integration. The authors argue that transportation agencies must shift their cultural focus from construction and maintenance to operations. Achieving this requires sustained funding for operations, improved human resources, and stronger public-private partnerships. The report emphasizes that overcoming institutional barriers and integrating disparate ITS components into a holistic, interoperable network is essential for realizing the full benefits of ITS in reducing congestion, enhancing safety, and improving transportation productivity.

Key finding

Institutional barriers, rather than technical limitations, constitute the primary obstacle to widespread ITS deployment, and significant system integration is required to achieve full effectiveness.

Methodology

review

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• automated enforcement cameras

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• Applied Guidance: countermeasure evaluation