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.
Four overlay systems were applied to concrete bridge decks in north Louisiana in May 1995 to evaluate their performance as friction surface and also as concrete sealers. Dural Flexolith, Poly-Carb Flexogrid, and Con/Chem Con/Crete were placed on three separate bridge deck; sand and Dural epoxy were placed on the fourth deck. Friction numbers were m
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The chemical composition, phases present, and textural characteristics of suite of 113 fly ashes were studied. The fly ashes came from Gifford-Hill & Co., Inc. power plants in Cason, TX; Gentry, AR; Westlake, LA; Boyce, LA; Choteau, OK and Oologah, OK. Two ordinary Portland cement (OPC) concrete samples, with 7:3 aggregate to cement weight ratio, a
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United States. Congress. Office of Technology Assessment
1991-12-01
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This report examines the major issues associated with developing new fuel economy standards. It builds on work that the Office of Technology Assessment conducted for its report, "Energy Technology Choices: Shaping Our Future." 118p.
Polymeric aircraft cabin materials have the potential to produce toxic gases in fires. Lethality (LC50) in animal models is a standard index to rank polymers on the basis of their combustion product toxicity. However, the use of times-toincapacitation (tis) may be more realistic for predicting relative escape times from a fire environment. Therefor
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The objective of this summative evaluation of the Airway Science Curriculum Demonstration Project (ASCDP) was to compare the performance, job attitudes, retention rates, and perceived supervisory potential of graduates from recognized Airway Science programs with those of individuals recruited through traditional means in the Air Traffic Control Sp
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Experience in Texas suggests problems may occur in stabilizing the air content of entrained concrete during and after pumping operations. In one instance, normal air entraining dosage rates were significantly exceeded in an effort to maintain the desired amount of air content in the concrete immediately after discharge. It was determined subsequent
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This report documents the results of the traffic data collection efforts during the first year of reconstruction on the US-75 North Central Expressway south of the 1-635 LBJ Freeway. Traffic conditions and patterns were monitored during October 1990 {approximately five months after the start of the reconstruction project) and during May 1991 (appro
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Syracuse Metropolitan Transportation Council (N.Y.)
1991-11-01
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The Syracuse Metropolitan Transportation Council is conducting this survey to develop plans that deal with past traffic increases and anticipate future changes that will affect transportation. The goal of the survey is to gather information specific to the syracuse area and its residents to manage existing traffic in the area and to plan for future
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Oregon. Department of Transportation. Materials and Research Section
1991-11-01
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A recent construction project involved widening and lowering the grade of the Swift Highway under the south end of the Oregon Slough Bridge approximately seven miles north of Portland. This project included construction of the first permanent soil nailed wall on the State highway system.The construction of this project shows that soil nailing is a
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The development and dissemination of the Rockfall Hazard Rating System (RHRS) is complete. RHRS is intended to be a proactive tool that will allow transportation agencies to address rationally their rockfall hazards instead of simply reacting to rockfall accidents. The RHRS provides a defensible, standardized way to spend the limited construction f
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In 1989, two pavement striping tape materials were placed on two new asphalt pavements. A two-year performance evaluation of the materials has been completed by the Oregon State Highway Division's (OSHD's) Materials and Research Section.On the first project a 3M Stamark Pliant Polymer Pavement Marking Tape - Series 5730, was placed on an Oregon den
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The study objective was to see if microsilica concrete (MC) is a viable alternative to the latex modified concrete (LMC) usually used on bridge deck overlays in Oregon. The study addresses MC overlays placed in 1989 on 7 portland cement concrete (PCC) bridge decks. This report covers the performance of the overlays during the first year of use.Afte
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This research effort was part of ADOT's New Product Evaluation Program. The objective was to evaluate the construction and field performances of three commercially available paving fabrics; Paveprep, Glassgrid, and Tapecoat. The fabrics were designed to prevent or mitigate the propagation of reflective cracks through asphalt concrete overlays. The
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This human factors research in aviation maintenance addresses four tasks including studies of organizational behavior, job and task analysis in maintenance and inspection, advanced technology for training, and the application of job aiding to maintenance. The first phase of a three phase research program describes extensive preliminary investigatio
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The Minnesota Department of Transportation is continually investigating ways to improve the cold temperature performance of its asphalt concrete pavements. One reported method is to modify the asphalt binder with ground reclaimed automobile and truck tire rubber. In 1984, a project on TH 7 (State Project 4703-17) was selected for the field trial of
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The purpose of this study was to conduct a preliminary examination of the validity of the methods used for the TXDOT Auto Visitor Profile. There were two sources of bias investigated: (1) bias resulting from systematic differences in characteristics between respondents and nonrespondents to the TXDOT survey, referred to as non-response bias; and (2
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This report accesses the communications capacity of the traffic management systems being installed in Texas with a view to two-way communications between the traffic management centers and vehicles on the roadway. The study will investigate the general telecommunications requirements for information flow, both from and to vehicles and traffic cente
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This report is a theoretical analysis of several communications techniques that will be useful in the full implementation of IVHS technologies. The report is a continuation of the work completed in Part I. It looks at some of the communications problems that have been mentioned as bringing some difficulties to spread spectrum, such as the near-far
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