This document describes the Federal Fiscal Year (FFY) 2013 State Planning and Research Work Program for the Oklahoma Department of Transportation (ODOT). This program is prepared and submitted according to provisions of Title 23, United States Code, regulated under 23 CFR Part 420. Part 1 of the work program describes the Planning activities and Pa
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This project was undertaken to support the Michigan Department of Transportation’s (MDOT) implementation of a new Pavement Management Tool (PMT), a decision-support system designed to optimize pavement project selection. The goal was to develop data-driven inputs for the PMT using MDOT’s extensive historical pavement condition and maintenance data,
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MDOT has been using the Distress Index (DI) since the inception of its pavement management system (PMS) in the early 1990s. DI was developed to help MDOT engineers decide, allocate budgets, and prioritize future maintenance or reconstruction activities. However, the raw data requirements for the DI are complicated (and somewhat unique compared to t
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While head-on crashes generally constitute a small proportion of total crash occurrences, they often result in fatal and incapacitating injuries. As a result, many agencies are exploring strategies to mitigate head-on crashes and resulting injuries. This research examined head-on crashes that occurred in Florida Department of Transportation (FDOT)
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This report contains the test setup and results from six pendulum crash tests performed at the Federal outdoor Impact Lab (FOIL) located at the Turner-Fairbank Highway Research Center in McLean, Virginia. The tests were conducted on steel w-beam rail elements rigidly anchored at both ends (a four-post configuration). The tests were conducted as par
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The focus of this project is to develop practical information and recommendations on the relationship between height and frequency of mowing. There is concern that current mowing practices are not timed to maximize the viability of the mixture of plants found in highway right-of-ways. It is hoped that mowing frequency can be reduced in some locatio
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Costs due to corrosion of reinforcement in concrete caused by deicing salts have been estimated at up to $1 billion per year in the U.S. alone. For most situations, corrosion-inhibiting admixtures offer significant advantages over other protection methods to delay initiation of corrosion for the service life of the structure. Phase II of this proje
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United States. Department of Transportation. Federal Aviation Administration
1996-09-17
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PDF
This Priority Letter Airworthiness Directive (AD) is prompted by an inflight failure of the main rotor gearbox (gearbox) on a French-registered Model R44 helicopter which resulted in an accident. An inspection of the gearbox revealed that the 18 bolts securing the gear, part number (P/N) C146-3, to the gear carrier assembly (gear carrier), P/N C268
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United States. Department of Transportation. National Highway Traffic Safety Administration
1997-08-01
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PDF
Since 1978, with the publishing of "A Model State Classified Licensing Program," AAMVA and NHTSA have cooperated in the development of over twenty publications in the "Guidelines for Motor Vehicle Administrators" series. Implementation by the AAMVA membership of the practices provided in these guidelines has gone a long way towards meeting the esta
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United States. Congress. Office of Technology Assessment
1991-06-01
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PDF
Anticipating heated debate on highway, transit, and related surface transportation issues, Congress asked OTA in May 1990 to use the information and background accumulated during its infrastructure studies, "Rebuilding the Foundations" and "Delivering the Goods," and undertake a focused analysis of surface transportation policies, programs, and tec
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John A. Volpe National Transportation Systems Center. Department of Transportation. Office of Strategic Initiatives for Research and Innovation.
2026-01-01
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The U.S. DOT Volpe Center’s Annual Review publication highlights our best work of the past year and illustrates the sustained impact of the U.S. DOT Volpe Center and its workforce on advancing innovation for the public good on behalf of U.S. DOT and other sponsoring agencies. This year’s book features over 40 stories in support of U.S. DOT operatin
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United States. Department of Transportation. Bureau of Transportation Statistics
2026-01-01
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Port Performance Freight Statistics Program: Annual Reports to Congress
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U.S. ports are located throughout the country and are critical for the U.S. economy. In 2024, they accounted for 41 percent of all U.S. imports and exports, totaling over $2.1 trillion. Exports accounted for 34 percent of this value while imports accounted for 66 percent. In addition, waterborne transportation1 and its support activities employed 1
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