United States. Department of Transportation. Federal Highway Administration
2024-07-01
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The Florida Department of Transportation (FDOT) has implemented a high-wind alert system on multiple road bridges across the State. The system assists the transportation and public safety of communities by providing real-time wind speed status information during severe weather events from each monitored bridge structure. This information is used to
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This Aquatic Organism Passage (AOP) Implementation Guide (Guide) supports transformative practices for waterway-transportation crossing design for successful removals of AOP barriers. This Guide does not present a single approach, as there are many approaches. Instead, it provides general principles for successful application allowing flexibility t
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United States. Department of Transportation. Federal Highway Administration
2024-07-01
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PDF
This fact sheet highlights the methodology of measuring decarbonization in the pavement lifecycle. Pavement management can be a suitable phase for considering and introducing environmental improvements to optimize pavement preservation and maintenance treatment timing, location, and type (when, where, and what) because of the phase’s focus on syste
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United States. Federal Highway Administration. Exploratory Advanced Research Program
2024-07-01
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This comprehensive plan embraces the Safe System Approach, which includes five elements that need to be addressed to achieve zero traffic deaths: safe road users, safe vehicles, safe speeds, safe roads, and post-crash care. The risk of fatality and injury for vulnerable road users (VRUs) (i.e., any road user not in a motor vehicle with a protected
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
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2024-07-01
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This document provides guidance for State Planning and Research (SPR) peer exchanges. The document contains information about the purpose of peer exchanges and the use of peer exchanges to strategically improve research programs and guidance and resources on conducting peer exchanges. This document should be of interest to State research directors,
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United States. Department of Transportation. Federal Highway Administration
2024-07-01
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PDF
This case study looks at recent activities initiated by State transportation departments to improve coordination with railroads on design-build projects.
Adaptive route optimization (ARO) is a method of dynamically and effectively routing winter maintenance vehicles across all segments of a road network to meet an agency’s maintenance goals, subject to real-time disruptions from atmospheric and road weather conditions, traffic congestion, incidents, work zones, and resource constraints. ARO could en
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This report describes Federal Highway Administration research efforts to develop mechanistic-based performance testing and analysis tools for the purpose of understanding fundamental pavement performance and easing deployment of performance tests and associated analysis and evaluation tools to understand long-term performance.
Changeable message sign (CMS) messaging is an important tool for distributing traveler information to drivers. Careful CMS message selection can help drivers make informed travel decisions and increase the safety and usability of roadways—particularly during nonrecurring events. The current approach is designed to help CMS operators construct CMS m
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United States. Department of Transportation. Federal Highway Administration. Office of Operations
2024-07-01
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National Travel Time Dashboard: Interstate Highways
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The Monthly Urban Congestion Report (UCR) provides a state-level overview of traffic congestion and reliability trends on Interstate highways. Published every month, the report compares data from the most recent month with the same month in the previous year. It uses travel time data from the Federal Highway Administration’s National Performance Ma
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This document is a technical summary of the Purdue University report, Measurement of Post-Tensioning Tendon Force Using Optical Fiber Technology, available at https://rosap.ntl.bts.gov/view/dot/75679. This report is a deliverable from a research study sponsored by the Federal Highway Administration (FHWA). The FHWA is the source of all figures and
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Complex freeway interchanges are difficult to navigate in many cases. Poorly designed signs at such locations, along with contributing roadway and traffic factors, frequently lead to increased crash risks. A sign design issue typically seen on urban freeways is the use of complex guide signs. The 2009 Manual on Uniform Traffic Control Devices sets
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United States. Department of Transportation. Federal Highway Administration
2024-07-01
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The Arkansas Department of Transportation (ARDOT) organized their 2022–2027 Strategic Highway Safety Plan (SHSP) into four emphasis areas in alignment with the Safe System Elements (Safe Road Users, Safe Vehicles, PostCrash Care, and Safe Roads and Safe Speeds combined) to support their long-term goal of zero fatalities and serious injuries.
This technote provides an overview of the Long-Term Pavement Performance (LTPP) Analysis-Ready datasets. The goal of the Long-Term Pavement Performance (LTPP) program is “to increase pavement life by the investigation of long-term performance. . . .” (FHWA 2015). One of the six objectives identified to support this goal was the establishment of a n
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The purpose of this Tech Brief is to present an overview of sampling procedures for asphalt mixtures. The document is intended for highway agency and contractor engineers.
The objective of this project was to evaluate and produce uniform recommendations for Advisory Exit and Ramp Speed signs (W13-2 and W13-3) and Combination Horizontal Alignment/Advisory Exit and Ramp Speed signs (W13-6 and W13-7), including basis for speed designation, use of “Exit” versus “Ramp,” effects of sign placement, and optimization of sign
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United States. Department of Transportation. Federal Highway Administration
2024-07-01
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FHWA R&T Now
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A newsletter about research, development, and technology (RD&T) at the U.S. Department of Transportation’s (USDOT) Federal Highway Administration (FHWA).
United States. Department of Transportation. Federal Highway Administration
2024-07-01
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PDF
This Vehicle Size and Weight (VSW) Research Updates Brief provides U.S. Department of Transportation (USDOT) VSW experts with recurring updates about VSW-related projects, research, news, and events. VSW research topics refer to safety, pavement, bridges, mode choice, enforcement, economics, data, technology, regulations, guidance, and other relate
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United States. Department of Transportation. Federal Highway Administration
2024-07-01
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This fact sheet highlights the project sponsored by Exploratory Advanced Research (EAR), that seeks to wants to enhance automation of pavement information collection for use in pavement condition safety and evaluation at highway speed. Through this project, titled Artificial Intelligence Approaches to Multi-Object Evaluations of Pavement for Condit
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