TRB - VibeWire Magazine

Innovations in Freight Data: 2023 Workshop

Guest authors
February 17, 2024
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The 4th Innovations in Freight Data Workshop was held September 19–21, 2023, at the Keck Center of the National Academies of Sciences, Engineering and Medicine in Washington, DC. TRB’s Transportation Research Circular E-C288: Innovations in Freight Dat…

Seismic Site Response Analysis with Pore Water Pressure Generation: Guidelines

Guest authors
February 17, 2024
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One-dimensional (1D) equivalent-linear total-stress site response analysis (SRA) is the de facto standard for state department of transportation (DOT) highway facilities at locations where site-specific ground response analyses are conducted. However, …

Seismic Site Response Analysis with Pore Water Pressure Generation: Resources for Evaluation

Guest authors
February 17, 2024
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There are many seismic site response analysis programs that operate in either the time domain or the frequency domain. These programs are available as public domain software, as commercial products, and/or through direct contact with the authors. NCHRP…

Ensuring Timely Pipeline Shutdowns in Emergencies: When to Install Rupture Mitigation Valves

Guest authors
February 16, 2024
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Since 2022, automatic or remote-control shutoff valves have been required on new hazardous liquid and gas transmission pipelines located in or near populated and environmentally sensitive areas. They are intended to enable faster shutdowns of ruptured …

Open Platform to Attract, Organize, and Coordinate Volunteers for Rural and Small Urban Transit

Guest authors
February 16, 2024
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One of the most critical challenges facing rural and small urban transit agencies in the United States today is the scarcity of available funds. Although volunteers can help transit agencies reduce operational costs, barriers such as difficulties attra…

User’s Guide for Quantifying the Effects of Vehicle Mix on Crash Frequency and Crash Severity

Guest authors
February 14, 2024
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Heavy vehicle traffic and vehicle mix have a substantial impact on crash frequency and severity. The consideration of vehicle mix would improve predictive methods for crash frequency and severity. Improved methods will result in better use of the limit…

Transportation for People with Disabilities and Older Adults During COVID-19: Lessons for Emergency Response

Guest authors
February 10, 2024
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The COVID-19 pandemic left many persons with disabilities and older adults without reliable transportation to access essential goods, medical care, and social engagements. Issues of social isolation for older adults were exacerbated with the emergence …

The Future of Airport Finance

Guest authors
February 9, 2024
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As airport leaders look to the future, it is important to consider how airports will fund their operations and investments and balance the risks in providing services to their customers and users while maintaining sound balance sheets. Transportation I…

Background and Development of a Guide for Intersection Control Evaluation

Guest authors
February 9, 2024
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A variety of intersection control evaluation processes and metrics are used by highway agencies for evaluating intersection geometry and control options and identifying an optimal geometric and control solution for an intersection. These processes usua…

Guide for Intersection Control Evaluation

Guest authors
February 9, 2024
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Intersection control evaluation (ICE) is fundamentally a process that provides the framework, steps, and tools and offers decision support for assessing trade-offs between different types of intersection forms and controls. NCHRP Research Report 1087: …