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.
The objective of this research project were to determine the compressive strength and stiffness properties of coupons taken from undamaged portions of bridge piles, the level of loss of creosote and cellulose in the wood material by chemical analysis and the loss of lignin by chemical analysis and microscopic examination. Meanwhile, the research pr
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The realization that one can no longer build out of congestion while preserving the urban environment has led to an increasing interest in the potential application of transportation control measures (TCM) for curbing travel demand. One such TCM that is being considered by transportation planning agencies around the country is parking pricing where
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Stone Matrix Asphalt (SMA) mixtures have been used in the United States since 1991. The traffic rate has been high on many of these pavements resulting in a significant amount of traffic during a short period of time. In 1994 the Federal Highway Administration awarded a contract to the National Center for Asphalt Technology (NCAT) to determine the
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This report summarizes the performance of microsilica concrete (MC) overlays on seven distressed portland cement concrete bridge decks at three sites in Oregon. This report emphasizes the overlays' condition after four years of use.After four or five years, there was cracking on all seven overlays and delamination on five overlays. On the two overl
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The Traffic Management Advisor (TMA), the sequence and schedule tool of the Center/TRACON Automation System (CTAS), was evaluated at the Fort Worth Center (ZFW) in the summer of 1996. This paper describes the challenges encountered during the various phases of the TMA field evaluation, which included system (hardware and software) installation, per
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A knowledge-based system for scheduling arrival traffic in the terminal area, referred to as the Final Approach Spacing Tool (FAST), has been implemented and operationally tested at the Dallas/Fort Worth Terminal Radar Approach Control (TRACON) facility. Two types of controller advisories are generated by FAST: sequence number and runway assignment
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National Research Council (U.S.). Panel on Human Factors in Air Traffic Control Automation
1997-01-01
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The nation's air traffic control system is responsible for managing a complex mixture of air traffic from commercial, general, corporate, and military aviation. Despite a strong safety record, the system does suffer occasional serious disruption, often the result of outdated and failed equipment. When equipment failures occur, system safety relies
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This paper is about the National Aeronautics and Space Administration (NASA) and the practice of professional ethics. It has been eleven years (Jan 28, 1986) since the Challenger accident and the past decade has been a time of investigation, assessment, and finger-pointing, as well as a time for introspection and internal reform. While there has be
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Large scale microscopic (i.e. vehicle-based) traffic simulations pose high demands on computation speed in at least two application areas: (i) real-time traffic forecasting, and (ii) long-term planning applications (where repeated "looping" between the microsimulation and the simulated planning of individual person's behavior is necessary). As a ro
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Much of the work on Intelligent Transportation Systems (ITS) to date has emphasized technologies, Standards/protocols, architecture, user services, core infrastructure requirements, and various other technical and institutional issues. ITS implementations in the United States and elsewhere in the world have demonstrated benefits in the areas of saf
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A computer model has been developed to simulate highway traffic for various degrees of automation with a high degree of fidelity in regard to driver control and vehicle characteristics. The model simulates vehicle maneuvering in a multi-lane highway traffic system and allows for the use of Intelligent Transportation System (ITS) technologies such a
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Personal travel and how it changes is of continuing concern to transportation planners and policy makers. Information about daily travel patterns is generally captured using self-reported information using a written diary and telephone retrieval (or mail-back of diary forms). Problems with these self-reported methods include lack of reporting for s
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The Internet is a unique medium for the distribution of information, and it provides a tremendous opportunity to take advantage of peoples innate interest in transportation issues as they relate to their own lives. In particular, the World Wide Web (WWW), with its ease of use and graphical nature, will allow us to better explain and illustrate tran
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This FY 1998 Proposed Rail Improvement Program Supplement contains those rail plan amendments which have been published subsequent to the FY 1997 Proposed Rail Improvement program supplement. This document also contains the benefit/cost methodology used to create the amendments.
ISTEA includes specific requirements for inclusion in studies of Major Investment Projects in Metropolitan Planning Areas. The State of Michigan initiated a Major Investment Study (MIS) in October 1994 for the redesign and reconstruction of a 7 mile long section of I-94 from the I-96 (Jeffries) Freeway Interchange easterly to its interchange with C
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For many small and medium-sized cities, funding a full Home-Interview survey, with costs as high as $100 per household, is not feasible. Traditionally, such a survey has provided the basic foundation for developing a truly useful travel demand model. Without it, model development has been handicapped by the lack of such behavioral, disaggregate dat
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Clear, yet detailed, presentations of transportation planning data to lay groups as well as to technical groups is becoming more and more of a necessity in the planning process. Presentation of technical information in understandable terms has become increasingly critical to the decision making process. Professionals develop significant quantitativ
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In major investment analyses and transit corridor studies, the impact of conventions, sporting matches, and other special events on transit ridership is often of interest. In many locations, it is hypothesized that additional ridership to and from such sites can provide substantial additional revenue for the transit system at little additional cost
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