Commercial vehicle (CV) retrofit safety device (RSD) kits project.
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Summary
This report details the development and deployment of Retrofit Safety Device (RSD) kits for commercial vehicles as part of the U.S. Department of Transportation’s Connected Vehicle Safety Pilot Program. The project aimed to evaluate the unique challenges and capabilities of deploying connected vehicle technology in a commercial environment, distinct from passenger vehicles. The primary objective was to gain insight into vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications, safety application performance, and human factors through real-world data collection. The RSD kits were designed for Class 6/7/8 commercial vehicles with a Gross Vehicle Weight Rating exceeding 19,500 lbs. Each kit comprised a DSRC radio, GPS receiver, embedded gyroscope, J1939 CAN interface, and a Human-Machine Interface (HMI) implemented as a 7-inch Android tablet. The hardware utilized standardized interfaces to allow component upgrades. The DSRC radio handled BSM generation and safety applications, while the HMI provided auditory and visual warnings. To prevent driver distraction, the tablet interface was locked during vehicle motion, displaying alerts only when triggered. A subset of vehicles was also equipped with a Data Acquisition System (DAS) featuring a PC/104 stack, three video cameras, and a forward-facing radar to record operational data, including video, vehicle state, and DSRC messages, for post-event analysis. The RSD kits implemented three safety applications: Emergency Electronic Brake Light (EEBL), Forward Collision Warning (FCW), and Curve Speed Warning (CSW). EEBL warned drivers of hard braking events ahead, triggered by decelerations exceeding 0.3 g at speeds between 25–67 mph. FCW assessed collision risk based on time-to-impact, speed delta, and path alignment, issuing warnings when impact was predicted within five seconds. CSW utilized Traveler Information Messages from infrastructure to alert drivers approaching curves at unsafe speeds. The system broadcast Basic Safety Messages at 10Hz, adhering to SAE and IEEE standards. The report identifies several limitations and lessons learned. Physical installation challenges included line-of-sight occlusion for DSRC antennas, necessitating dual antennas mounted on the cab roof fairing. The authors recommend more integrated antenna solutions to reduce cable length and RF attenuation. Additionally, the report suggests broadcasting separate BSMs for tractors and trailers during turns to improve footprint accuracy. Limitations in Traveler Information Message representation regarding location and direction were noted, with recommendations for improved geometric modeling. The project provided crucial empirical data on the maturity and robustness of connected vehicle technologies in commercial settings, offering specific recommendations for future hardware integration and message standardization.
Key finding
Retrofit Safety Device kits successfully enabled commercial vehicles to transmit and receive Basic Safety Messages and execute safety applications like Forward Collision Warning and Curve Speed Warning through a standardized integrated hardware and software architecture.
Methodology
field_study
Sample size: 8
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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- Methodological Resource: tool software, dataset resource