Effects of Work Zone Infrastructure on Transitioning from Automated to Manual Driving for Work Zones with Lane Reductions
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Summary
This study investigates how work zone infrastructure influences driver behavior when transitioning from SAE Level 2 automated driving to manual control in environments with lane reductions. The research addresses the challenge that work zones often fall outside the operational design domain of advanced driver assistance systems (ADAS), requiring drivers to resume control. The authors examine whether cooperative driving automation (CDA) messages—simulating different infrastructure types—can improve the safety and smoothness of this transition by providing earlier or more detailed takeover requests. The experiment involved 88 licensed drivers navigating a closed-track, four-lane highway at approximately 50 mph. Participants drove two passes through work zones with lane reductions: one pass with a simulated CDA message and one control pass with no message. The study manipulated two variables: message detail (basic vs. detailed) and notification lead time (short at 312 feet vs. long at 1,640 feet). These conditions simulated four infrastructure types: standard work zones (basic/short), machine-readable signs (detailed/short), C-ADS-equipped zones using machine-to-machine communication (basic/long), and smart C-ADS zones (detailed/long). Data collection included vehicle controller area network metrics for steering variability and speed, eye-tracking for attention analysis, physiological measures for stress, and post-drive questionnaires. Results indicated that detailed CDA messages had a greater impact on driver behavior than basic messages, particularly regarding the timing of disengaging ADAS features, merging into open lanes, and attention to in-vehicle displays. Drivers receiving detailed information were better prepared to navigate the lane reduction. The study found that while lead time and message detail influenced performance, the effect varied among individuals. Detailed messages helped drivers gain situational awareness more effectively, allowing for smoother transitions back to manual control. Physiological and questionnaire data further assessed driver stress and acceptance of the automation, supporting the utility of CDA messages in enhancing safety for Level 2 ADAS vehicles. The findings suggest that integrating CDA messages into work zone infrastructure can significantly improve safety strategies for mixed fleets containing partially automated vehicles. By providing drivers with specific, timely information about upcoming work zones, transportation agencies can mitigate the risks associated with delayed driver responses and reduced situational awareness. The study supports the implementation of smart work zones and machine-readable signs as effective tools for Transportation Systems Management and Operations, ensuring that drivers receive adequate warning and context to safely resume vehicle control before encountering complex driving environments.
Key finding
Detailed cooperative driving automation messages provided with longer lead times significantly improved driver performance and attention during the transition from automated to manual control in work zones with lane reductions.
Methodology
on_road
Sample size: 88
Provenance
The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via bulk_ingest_rosap on 2026-05-23 (6 acquisition events logged).
| 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 |
| chunk | success | — | — | — | 1 | 2026-06-01 |
| 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 | — | — | 19 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
Topics
Ranked by relevance to this paper. Hover a topic for its definition.
- work zones
- odd communication
- automation
- emergency work zone conspicuity
- takeover transitions
- automation surprise
Information type
What kind of knowledge this paper contributes, grouped by family — independent of topic (what it is about) and method (how it was studied).
- Empirical Findings: behavioral performance data
- Methodological Resource: measurement protocol
- Theoretical Contribution: conceptual framework