Estimated benefits of connected vehicle applications : dynamic mobility applications, AERIS, V2I safety, and road weather management applications.
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Summary
This report, produced by Noblis, Inc. for the U.S. Department of Transportation’s Intelligent Transportation Systems Joint Program Office, evaluates the estimated benefits of connected vehicle applications. It synthesizes findings from five years of federal research and development focused on Vehicle-to-Infrastructure (V2I) communications. The study addresses the potential of connected vehicles to transform travel by enhancing safety, mobility, and environmental stewardship through advanced wireless communications, onboard processing, and smart infrastructure. Specifically, it assesses nearly 50 application concepts developed under four USDOT research programs: Dynamic Mobility Applications (DMA), Applications for the Environment: Real-Time Information Synthesis (AERIS), V2I Safety, and Road-Weather Management. The methodology combines field demonstrations, prototype testing, precursor safety analysis, and simulation or analytical studies. The DMA program developed 16 of 17 planned mobility applications, testing them in locations such as Los Angeles, Dallas-Fort Worth, and Seattle to assess technical soundness and transformative impact. The AERIS program focused on eco-driving and emissions reduction, while the V2I Safety program targeted intersection and curve-related crashes. The Road-Weather Management program evaluated weather-responsive traffic controls. The report notes that the magnitude of benefits is highly dependent on deployment levels of roadside and in-vehicle technology, though applications targeting fleet vehicles are identified as early winners. Key findings indicate significant potential impacts across all three domains. In terms of safety, V2I applications at signalized intersections could address up to 575,000 crashes and 5,100 fatalities annually, while curve speed warning applications could address up to 169,000 crashes and 5,000 fatalities. Mobility benefits include up to a 27% reduction in travel time on arterial corridors through multimodal traffic signal systems, up to a 10% reduction in transit vehicle travel time via priority signaling, and up to a 23% reduction in emergency vehicle travel time. Environmental impacts include up to 11% reductions in CO2 emissions and fuel consumption in signalized networks, and annual mobile emissions savings of 3,100–9,400 tons through integrated corridor management. Additionally, weather-responsive variable speed limits were found to reduce crashes by up to 25% during winter weather. The report concludes that while Dedicated Short Range Communications (DSRC) is central to V2I safety applications, its role in mobility and environmental applications is currently optional or emerging. The synthesis suggests that combinations of V2I applications are particularly effective in signalized networks and congested freeway segments. The findings provide a baseline for understanding the operational benefits of connected vehicles, highlighting that widespread deployment could yield substantial improvements in transportation efficiency, safety, and environmental performance.
Key finding
Combined V2I connected vehicle applications in signalized networks reduce overall delay by up to 27% and CO2 emissions by up to 11%, while safety applications may address up to 575,000 crashes and 5,100 fatalities annually at intersections.
Methodology
mixed_methods
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