The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations.
Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.
Maximum annual 24-hour maps and Intensity-Duration-Frequency (I-D-F) curves for return periods of 2, 5, 10, 25, 50 and 100 years were developed using hourly precipitation data. Data from 92 rain gauges for the period of 1948 to 1987 were compiled and combined into 26 synthesized stations. Five probability distributions and three parameter estimatio
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Extensive strain measurements were carried out on three cross girder boxes used to connect the cable stays to the orthotropic deck-trapezoidal box steel structure. The measurements were obtained at CG3, CG4 and CG5 adjacent to the tower at pier 2.The measurements wre focused on details which had known cracks that had been retrofitted by installing
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Oregon. Department of Transportation. Materials and Research Section
1991-08-01
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Conclusions from recent research conducted for the Strategic Highway Research Program (SHRP) indicate the tracking of salt by vehicles is greater than one-half mile but less than one mile. Therefore, an expected recommendation from the SHRP is "salts" not be used within one mile of concrete reinforced with steel. Consequently, the Oregon State High
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The utility of the simulation package TRAF-NETSIM to the traffic engineer is assessed and demonstrated by means of a case study. The methodology employed in performing the analysis is presented in a way that will aid future users of TRAF-NETSIM. The advantages and disadvantages of TRAF-NETSIM are documented along with the human resource requirement
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Soil nailing as an alternative lateral earth support method has recently been introduced in Oregon to build the first permanent Soil-Nailed Wall on the State's Highway System.The soil nailing technique was used for an underpass widening to provide for additional traveling lanes under the existing Oregon Slough Bridge in Portland, Oregon. The projec
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United States. Department of Transportation. Federal Aviation Administration
1991-08-01
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This report has been prepared in response to language in Senate Report 101-121 on the Department of Transportation and Related Agencies Appropriations Act for FY 1990. The Federal Aviation Administration (FAA) was requested to study the feasibility of establishing regional air-cargo airports to relieve congestion at major airports in the immediate
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The advent of Geographic Information Systems (GIS) has facilitated the integration of data with geographic elements to perform analysis in a variety of disciplines, including transportation. The unique ability of GIS to handle complex spatial relationships makes it a natural tool to use in the planning and analysis of transportation systems, specif
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The potential need for testing workers in the aviation industry for job-related alcohol abuse requires the development of a testing strategy based, in part, on selection of alcohol test instruments appropriate to the specific goals of the Federal Aviation Administration. The extensive availability of test. instruments with varying capabilities and
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All of these issues were the reasons for the development of the 1984 Local Roads Needs study that was conducted by the South Dakota Department of Transportation. The 1984 study attempted to determine funding needs for the county transportation network. The study collected a wealth of information pertinent to county needs. The reported funding needs
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When a pavement structure fails prematurely, the constructing agency must pay millions of dollars in traffic control and construction costs to rehabilitate or reconstruct the pavement sooner than had the pavement survived its design life. The money required to rehabilitate or reconstruct the pavement could have been put to alternative uses during t
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The Texas Trip Distribution Models are a collection of computer programs designed to perform trip distributions featuring the application of either a constrained interactance model or the Atomistic Model. Other programs available in the package provide full support. The purpose of this manual is to provide users with operating instructions for the
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In June of 1989, the Texas Department of Transportation (TxDOT) contracted with the Texas Transportation Institute (1TI) to develop a set of performance specifications for truck mounted attenuators (TMA's). The objectives of this project were to (1) assess the performance of several truck mounted attenuators and then (2) develop and propose the cri
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In June of 1989, the Texas Department of Transportation (Tx:D01j contracted with the Texas Transportation Institute (TI1) to develop a set of performance specifications for truck mounted attenuators (TMA's). The objectives of this project were to (1) assess the performance of several truck mounted attenuators and then (2) develop and propose the cr
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In June of 1989, the Texas Department of Transportation (TxDOT) contracted with the Texas Transportation Institute (TTI) to develop a set of performance specifications for truck mounted attenuators (TMA's). The objectives of this project were to (1) assess the performance of several truck mounted attenuators and then (2) develop and propose the cri
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The Train Energy Model (TEM™) is computer simulation software developed by the Transportation Technology Center, Inc. (TTCI, now MxV Rail) for analyzing fuel consumption and train running times based on train resistance and train handling techniques. The model determines the effects of train makeup, truck (or bogie) types, track conditions includin
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Oregon has twelve pavement test sites that are part of the Strategic Highway Research Program (SHRP), Long Term Pavement Performance (LTPP) studies. Part of the data gathering on these sites involves vehicle weight and classification. This pilot project was to help SHRP show others how to specify, procure and install equipment that would provide th
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Proposed research on this project included five main objectives: 1) To test and evaluate the physical characteristics of flyash concrete in comparions to non-flyash concrete. Tests will be conducted to see if flyash concrete meets OSHD specifications for compressive strength and if the current specifications for flyash can be used without modificat
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This report documents the methodology used to develop the aviation activity forecasts prepared as a part of the update to the Louisiana Airport System Plan and provides Louisiana aviation forecasts for the years 1990 to 2010. In general, the forecasts are based on market share analyses using forecasts of U.S. aviation activity published by the U.S.
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The objective of this study was to construct SENTRE and TREND attenuator systems and evaluate their in-service performance as set forth in NCHRP-230 for a period of two years. The evaluation was conducted as part of ADOTs New Product Evaluation Program. Both of the systems had performed satisfactorily in full scale crash testing conducted during ot
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Oregon. Department of Transportation. Materials and Research Section
1991-07-01
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Oregon must use natural rock deposits that exhibit a wide variety of physical, chemical, and geological properties. To help ensure the quality of these aggregates, the Oregon State Highway Division (OSHD) has specifications regarding test requirements. These tests can generally be classified as tests to obtain information about a specific aggregate
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