Touch User Interfaces in Air Traffic Control: Final Guidelines Report with Recommended Updates for the FAA Human Factors Design Standard (HFDS) [FAA HF-STD-001B]
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Summary
This report addresses the need to update the Federal Aviation Administration’s Human Factors Design Standard (HFDS) [FAA HF-STD-001B] to accommodate the integration of touch-based user interfaces (TUIs) in air traffic control (ATC) systems. The existing standard provides limited guidance, focusing primarily on basic parameters like touch target size, while individual program teams have independently established requirements. The study aims to identify human factors issues, assess the applicability of existing standards, and generate comprehensive guidelines to ensure safe and effective TUI implementation in ATC environments. The research was conducted by Honeywell Aerospace Engineering under contract to the FAA. The methodology involved a comprehensive literature review of scientific literature, industry documents, regulatory materials, and user behavior assessments. This was followed by a gap analysis comparing current HFDS provisions against identified best practices and existing standards, such as MIL-STD-1472H. The report synthesizes these findings into preliminary recommendations for updating the HFDS, specifically targeting the TUI section. The report proposes expanding the HFDS to address TUIs as integrated display-touch systems rather than isolated components. Key recommendations include detailed guidelines on readability, specifying luminance transmission and contrast requirements to maintain legibility in high-ambient light conditions (up to 10,000 foot-candles) and in the presence of fingerprints. It defines specific touch target sizes and separations, ranging from 9.5 mm to 38 mm depending on the application, to minimize inadvertent errors. The guidelines also address touch gestures, recommending against multi-digit gestures for critical operations due to obscuration risks, and specifying latency limits of under 100 milliseconds for display response. Additionally, the report outlines ergonomic requirements, including display inclination angles to prevent wrist hyperextension and fatigue, and the necessity of hand stabilization in vibration-prone environments. The significance of this work lies in its provision of a structured framework for updating federal design standards to reflect modern interface technologies. By identifying gaps in current regulations and proposing specific, evidence-based requirements for readability, error mitigation, and ergonomics, the report supports the safe integration of TUIs into critical ATC operations. It also highlights areas requiring further research, such as the impact of heads-down time and task-dependent input methods, ensuring that future standard updates are grounded in comprehensive human factors analysis.
Key finding
The study generates a set of preliminary guidelines for updating the FAA Human Factors Design Standard, covering critical aspects such as touch target size, readability under high ambient light, latency limits, and ergonomic display positioning to ensure safe and effective use of touch interfaces in air traffic control.
Methodology
review
Provenance
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | rosap | — | — | 2 | 2026-05-23 |
| archive | success | — | — | — | 1 | 2026-05-23 |
| extract | success | cached | — | — | 2 | 2026-06-10 |
| clean | success | — | — | — | 1 | 2026-06-01 |
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| embed | success | — | — | — | 1 | 2026-06-02 |
| enrich | success | — | — | — | 1 | 2026-05-23 |
| promote | success | — | — | — | 1 | 2026-05-23 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 3 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 24 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
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- Applied Guidance: design guidelines