This document provides information to aid in understanding and using the Long-Term Pavement Performance (LTPP) program's Pavement Performance Database (PPDB), LTPP Traffic Analysis Software (LTAS) database, and contents of the Ancillary Information Management System (AIMS) and LTPP InfoPaveTM. This report describes the structure of the LTPP program
...
Cable-stayed bridges have been recognized as the most efficient and cost effective structural form for medium- to long-span bridges over the past several decades. With their widespread use, cases of serviceability problems associated with large-amplitude vibration of stay cables have been reported. Stay cables are laterally flexible structural memb
...
This updated Rails-with-Trails: Lessons Learned report documents how the state of the practice, perspectives, and context for rails-with-trails has evolved since 2002 and identifies updated effective practices for each phase of a rail-with-trail project, from development to design to construction, operation, and maintenance.
As part of the 2017 United States Department of Transportation (USDOT) Federal Highway Administration (FHWA) Roadway Surface Transportation Cybersecurity Framework project with Institute of Transportation Engineers (ITE), gaps were identified regarding the sharing of information amongst transportation stakeholders such as Infrastructure Owner Opera
...
The Federal Highway Administration's Long-Term Pavement Performance (LTPP) program issues a triannual newsletter to inform you about the progress and activities of the program. Brief updates on progress in important program activities are provided, including data collection, data releases, new products and publications, pooled fund studies, and dat
...
United States. Federal Highway Administration. Center for Accelerating Innovation
2021-05-01
|
PDF
Innovator, published by the FHWA Center for Accelerating Innovation, advances implementation of innovative technologies and processes in the highway industry. Its audience is transportation professionals in highway agencies, trade and research groups, academia and the private sector, and the driving public.
Historically, crashes have been viewed as the result of an error on the part of the individual roadway user—a law or rule was broken, a wrong decision made. The Safe System approach acknowledges that humans make mistakes and, importantly, are vulnerable to the forces that occur during a crash. By focusing on eliminating fatal and serious injuries t
...
While sulfate-induced corrosion problems have been observed in segregated grout, the existing literature lacks useful information about the role of sulfate ions in the corrosion process. To produce empirical data on the corrosivity and concentration of water-soluble sulfate ions under different grout conditions, researchers performed a laboratory s
...
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-05-01
|
PDF
On a monthly basis, each State is required to report to the Federal Highway Administration (FHWA), the amount of gallons taxed by that state. This data is analyzed and compiled by FHWA staff. The data on the amount of on-highway fuel use for each State is then used to attribute federal revenue to each State. Yearly, the FHWA, Office of Policy, prov
...
As a critical part of the infrastructure system, long-span bridges can be exposed to extreme conditions, such as floods, scours, and hurricanes, or severe dynamic loads, for example due to seismic shaking, blast, or impact. In spite of their importance to the resilience of adjacent communities, their redundancy and ability to mobilize alternative l
...
United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2021-04-30
|
PDF
The Weekly Gasoline Product Supplied Report offers insight on weekly fluctuation of the gasoline product supply, which is an important part of any analysis of construction trends, materials and operating costs associated with highway repair and construction, and changes in traffic volume. These data come directly from the Energy Information Adminis
...
The Department of Transportation Appropriations Act, 2021, allows States and territories to repurpose certain funds originally earmarked for specific projects. This memorandum provides the implementing guidance for this provision.
United States. Department of Transportation. Federal Highway Administration. Office of Operations
2021-04-28
|
PDF
As the nation develops an increasing reliance on technology and next generation transportation management, ensuring the availability of consistent, reliable data describing work zone events is critical to enabling agency management of highway operations. The FHWA is leading the Work Zone Data Initiative (WZDI) to improve the availability of informa
...
United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office
2021-04-27
|
PDF
The Identifying Real-World Transportation Applications Using Artificial Intelligence (AI): Real-World AI Scenarios in Transportation for Possible Deployment report (July 2020, FHWA-JPO-20-810) identifies practical real-world scenarios where AI offers the potential to address specific transportation needs. These high-value scenarios serve as a templ
...
United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office
2021-04-27
|
PDF
AI is revolutionizing every walk of life, allowing machines to learn from experience, adapt, and perform tasks that have historically required human cognition. The ITS Joint Program Office (JPO) established research in AI as a priority area to accelerate adoption of AI by state and local agencies for addressing transportation problems. The Identify
...
The User Needs Identification and Requirements Plan (UNIRP) outlines the process that the HIRTA team will follow for identifying user needs, developing concept of operations and then subsequently defining system requirements. The document also provides the current schedule for developing needs and requirements. Also, the document describes configur
...
Links with this icon indicate that you are leaving a Bureau of Transportation
Statistics (BTS)/National Transportation Library (NTL)
Web-based service.
Thank you for visiting.
You are about to access a non-government link outside of
the U.S. Department of Transportation's National
Transportation Library.
Please note: While links to Web sites outside of DOT are
offered for your convenience, when you exit DOT Web sites,
Federal privacy policy and Section 508 of the Rehabilitation
Act (accessibility requirements) no longer apply. In
addition, DOT does not attest to the accuracy, relevance,
timeliness or completeness of information provided by linked
sites. Linking to a Web site does not constitute an
endorsement by DOT of the sponsors of the site or the
products presented on the site. For more information, please
view DOT's Web site linking policy.
To get back to the page you were previously viewing, click
your Cancel button.