The Road Weather Bulletin: Road Weather Management Publications and Training Materials
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Summary
This document, titled *The Road Weather Bulletin*, serves as a comprehensive catalog of publications, research findings, and training materials produced by the U.S. Department of Transportation’s Road Weather Management Program (RWMP) and related agencies. It addresses the broader challenge of integrating weather information into transportation operations to improve safety, efficiency, and maintenance decision-making. The bulletin aggregates resources from various sectors, including the Federal Highway Administration (FHWA), the Federal Motor Carrier Safety Administration (FMCSA), and the National Weather Service (NWS), aiming to provide stakeholders with proven tools, policy guidance, and educational resources. The content covers several key domains of road weather management. In traffic management, the bulletin highlights studies on integrating weather data into Transportation Management Centers (TMCs), specifically detailing the implementation of automated weather alert systems in Sacramento, California, and self-evaluation efforts in Cheyenne, Colorado Springs, Kansas City, and Louisiana. Maintenance management resources include a benefit-cost assessment of the Maintenance Decision Support System (MDSS) in Denver, which demonstrated budget savings exceeding system costs while maintaining service levels. Additionally, the bulletin lists technical tools such as Traffic Analysis Tools (TAT) Volume XI, which models weather impacts on traffic flow, and reports on microscopic traffic analysis in inclement weather, including car-following and gap acceptance models calibrated for snowy, icy, and rainy conditions. Significant findings and developments are reported across these areas. The Denver MDSS case study confirms the financial viability of decision support systems for maintenance. Research on connected vehicles describes the development of a Vehicle Data Translator to incorporate vehicle-based atmospheric measurements. The bulletin also outlines the definition of 11 performance metrics to assess RWMP goals and identifies six attributes for characterizing road weather information quality based on professional surveys. Legal and operational guidance is provided through reports on state liability regarding Road Weather Information Systems (RWIS) and updated siting guidelines for environmental sensor stations. Furthermore, the document details the National Weather Service’s policy on supporting DOTs, clarifying that while NWS provides standard hazardous weather products, it refers agencies to the private sector for specialized road weather consulting. The significance of this bulletin lies in its role as a centralized resource for advancing the integration of meteorological data into transportation infrastructure. By compiling research on human factors, liability, and performance measurement, it supports the development of standardized practices for weather-responsive traffic management. The inclusion of specific training courses, such as those offered by the National Highway Institute and COMET, underscores the program’s commitment to educating transportation and meteorological professionals. Ultimately, the document facilitates the adoption of technologies like RWIS and connected vehicle applications, aiming to mitigate the societal and operational impacts of adverse weather on the nation’s roadways.
Key finding
The document compiles and indexes existing road weather management publications, training resources, and program accomplishments to support transportation agencies.
Methodology
review
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 (46 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 | — | — | 3 | 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 | 43 | 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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