System Capability Assessment of Cooperative Intersection Collision Avoidance System for Violations (CICAS-V)
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Summary
This report evaluates the system capability of the Cooperative Intersection Collision Avoidance System for Violations (CICAS-V), a vehicle-to-infrastructure prototype designed to warn drivers of impending red light or stop sign violations. Developed by the Crash Avoidance Metrics Partnership, the system utilizes roadside equipment to broadcast intersection geometry and signal status, while onboard equipment assesses vehicle speed and lane position to issue visual, audio, and haptic (brake pulse) warnings. The assessment aimed to determine if the system was mature enough for deployment in a full-scale Field Operational Test. The evaluation comprised two phases: objective tests conducted on the Smart Road test track at the Virginia Tech Transportation Institute and a pilot test involving nearly 100 naive drivers on public roads in Blacksburg, Virginia. The objective tests included twelve scenario types, such as approaches at varying speeds (25–55 mph), edge-of-lane positioning, late lane shifts, multiple intersections within a 300-meter radius, and dynamic signal changes. These tests employed strict validity criteria, including GPS accuracy constraints, and pass/fail metrics based on warning timing and presence. The pilot test involved drivers navigating a prescribed course with 13 equipped intersections, recording over 4,000 intersection crossings, alongside a subset of intentionally distracted drivers on the test track. Results from the objective tests demonstrated that CICAS-V performed as designed across a wide range of conditions. The system consistently issued timely warnings for vehicles exceeding safe stopping speeds at both signaled and stop-controlled intersections. It accurately distinguished between lanes, suppressing warnings for adjacent lanes even when the vehicle was near lane edges, and correctly handled dynamic lane shifts and multiple nearby intersections. The system also maintained robust performance under conditions that inhibited line-of-sight wireless reception. In the pilot test, the system functioned appropriately in the vast majority of crossings. It successfully warned three drivers approaching obscured stop signs and one driver facing a red signal. Additionally, it warned all 18 intentionally distracted drivers on the test track, enabling 17 to avoid violations. The study identified specific issues requiring remediation before full-scale deployment. Nuisance warnings occurred due to a flaw in the stop-controlled warning algorithm, an erroneous geographical intersection description, and desynchronized roadside equipment; these were corrected with minor fixes. One objective test run failed due to a missing haptic warning, though the test series passed overall. The findings confirm that CICAS-V is capable of providing timely, accurate warnings in common driving scenarios but requires fine-tuning of prototype components and local infrastructure data to minimize nuisance alerts prior to broader field operational testing.
Key finding
The CICAS-V system successfully issued appropriate warnings for potential violations and suppressed nuisance alerts in nearly all objective test runs and the majority of public road crossings, with only isolated failures due to specific algorithmic or data synchronization flaws.
Methodology
mixed_methods
Sample size: 100
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.
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- Applied Guidance: countermeasure evaluation