Precursor Systems Analyses of Automated Highway Systems Activity Area G Comparable Systems Analysis

Hickman, M.; Bonderson, L.; Livers, G.; Craig, D.; Lewis, D. · 1994 · ROSA P / United States. Department of Transportation. Federal Highway Administration

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Summary

This report, produced by Delco Systems Operations for the Federal Highway Administration, addresses the challenges of developing Automated Highway Systems (AHS) by analyzing "lessons learned" from comparable existing systems. As part of the AHS Precursor Systems Analyses program, the study aims to identify high-level issues and risks associated with AHS deployment. The research focuses on deriving benefits from past experiences in the design, implementation, and operation of systems that share key characteristics with AHS, specifically regarding public interaction, safety, reliability, complexity, and environmental demands. The methodology involved a two-stage analysis. First, the team identified twelve complex systems that partially correlated with AHS requirements, including automated teller machines, air traffic control, rapid transit, automobile air bags, and navigation systems. These were evaluated based on criteria such as the level of public interaction, technical complexity, safety constraints, and operational history. From this pool, three systems were selected for detailed trade-off analysis: the Bay Area Rapid Transit (BART) system, automotive supplemental inflatable restraint (SIR) systems (air bags), and the TRAVTEK automobile navigation system. The analysis compared these systems to AHS across factors including interaction, complexity, safety, reliability, diverse subsystems, and failure modes. The findings reveal distinct lessons from each comparable system. The BART analysis highlighted significant non-technical challenges, noting that political pressure led to premature revenue service before full testing was complete, resulting in technical shortcomings, high maintenance costs due to poor quality control, and a loss of public confidence. It emphasized the need for rigorous verification, testing, and realistic expectations for automated transit. The SIR analysis underscored the importance of market-driven development over regulation, the necessity of fail-safe design, and the utility of automatic diagnostic recording for liability and maintenance. It suggested that AHS, like air bags, must be tamper-proof and cost-effective while gaining public acceptance through education. The TRAVTEK analysis demonstrated that while drivers valued navigation features and perceived them as safe, price remained the highest risk for acceptance. It highlighted the complexity of integrating diverse subsystems and managing vehicle-to-infrastructure communications. The significance of this study lies in its provision of specific technical and managerial insights for AHS development. The authors conclude that AHS success depends on high-quality systems engineering, rigorous safety and reliability programs, and careful management of public perception. The report recommends that AHS development adopt the SIR’s approach to diagnostic recording and fail-safe design, learn from BART’s pitfalls regarding political pressure and testing adequacy, and address TRAVTEK’s pricing and integration challenges. Ultimately, the analysis suggests that AHS must balance extreme technical complexity with public acceptance, requiring robust verification, clear liability frameworks, and realistic cost-benefit assessments to ensure successful deployment.

Key finding

Comparative analysis of BART, air bags, and navigation systems reveals that successful AHS deployment requires rigorous verification testing, fail-safe design principles, and proactive management of public confidence and political pressures.

Methodology

review

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• automation surprise
• driverless ads

Information type

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• Applied Guidance: design guidelines