443 Matching Results

Search Results

Advanced search parameters have been applied.

Shared Communications: Volume 2. In-Depth Systems Research

Description: This report is the second of two documents that examine the literature for actual examples of organizations and agencies that share communications resources. While the primary emphasis is on rural, intelligent transportation system (ITS) communications involving transit, examples will not be limited to rural activities, nor to ITS implementation, nor even to transit. In addition, the term ''communication'' will be broadly applied to include all information resources. The first document of this series, ''Shared Communications: Volume I. A Summary and Literature Review'', defines the meaning of the term ''shared communication resources'' and provides many examples of agencies that share resources. This document, ''Shared Communications: Volume II. In-Depth Systems Research'', reviews attributes that contributed to successful applications of the sharing communication resources concept. A few examples of each type of communication sharing are provided. Based on the issues and best practice realworld examples, recommendations for potential usage and recommended approaches for field operational tests are provided.
Date: September 22, 2004
Creator: Truett, LF
Partner: UNT Libraries Government Documents Department

Intelligent Transportation Systems: Vehicle-to-Vehicle Technologies Expected to Offer Safety Benefits, but a Variety of Deployment Challenges Exist

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The development of vehicle-to-vehicle (V2V) technologies has progressed to the point of real world testing, and if broadly deployed, they are anticipated to offer significant safety benefits. Efforts by the U.S. Department of Transportation (DOT) and the automobile industry have focused on developing: 1) in-vehicle components such as hardware to facilitate communications among vehicles, 2) safety software applications to analyze data and identify potential collisions, 3) vehicle features that warn drivers, and 4) a national communication security system to ensure trust in the data transmitted among vehicles. According to DOT, if widely deployed, V2V technologies could provide warnings to drivers in as much as 76 percent of potential multi-vehicle collisions involving at least one light vehicle, such as a passenger car. Ultimately, however, the level of benefits realized will depend on the extent of the deployment of these technologies and the effectiveness of V2V warnings in eliciting appropriate driver responses. The continued progress of V2V technology development hinges on a decision that the National Highway Traffic Safety Administration (NHTSA) plans to make in late 2013 on how to proceed regarding these technologies. One option would be to pursue a rulemaking requiring their inclusion in new vehicles."
Date: November 1, 2013
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department

Intelligent Transportation Systems: Improved DOT Collaboration and Communication Could Enhance the Use of Technology to Manage Congestion

Description: A letter report issued by the Government Accountability Office with an abstract that begins "State and local governments currently use ITS technologies in various ways to monitor and control traffic and inform travelers. For example, transportation agencies use cameras to monitor traffic conditions, signal technologies to control traffic flow, and dynamic message signs to inform travelers about travel conditions. By interviewing experts, GAO identified several emerging uses of ITS that have significant potential to reduce traffic congestion. For example, integrating traffic and emergency services data can allow for enhanced detection of and response to roadway incidents. However, some cities use ITS and the emerging uses to a much greater extent than others."
Date: March 19, 2012
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department

Revision of the MCSAP Allocation Formula: Summary Report

Description: In 1982, Congress authorized the Motor Carrier Safety Assistance Program (MCSAP), a Federal grant-in-aid program to improve commercial motor carrier safety. MCSAP was reauthorized in 1986, 1991, and 1998. In June 1997, in anticipation of and preparation for reauthorization, a MCSAP Formula Workgroup convened to analyze requirements for a new allocation formula and to develop the formula. Because of provisions in the Transportation Equity Act for the 21st Century (TEA-21), a major change in approach was to consider including performance (i.e., safety improvements) in the formula. Oak Ridge National Laboratory (ORNL) actively participated in the Workgroup activities, provided technical assistance in evaluating factors and conducting scenario analyses, prepared regulatory language for the Federal Register Notice of Proposed Rulemaking (NPRM), analyzed NPRM comments and recommended responses to the comments, assisted with preparation of the Federal Register Final Rule, developed the final spreadsheet, and prepared an informational brochure on MCSAP for use by the States. The allocation of MCSAP funds for FY2001 will use the new formula.
Date: September 12, 2000
Creator: Truett, L.F.
Partner: UNT Libraries Government Documents Department

Deployment of ITS: A Summary of the 2010 National Survey Results

Description: This report presents summary results of the 2010 ITS Deployment Tracking survey, the most recent survey conducted by the ITS Deployment Tracking Project. The U.S. Department of Transportation and its member agencies, including the Research and Innovative Technology Administration, have pursued a research and development agenda, the Intelligent Transportation System (ITS) Program, designed to integrate the latest in information technologies to improve the safety, mobility, and reliability of surface transportation modes. Within metropolitan areas, implementation of these advanced technologies has been accomplished by a variety of state and local transportation and emergency management agencies as well as the private sector. In order to measure the rate of ITS deployment within the nation s largest metropolitan areas, the ITS Deployment Tracking Project has conducted a nationwide survey of state and local transportation and emergency management agencies nearly every year since 1997. The results presented in this report are intended to be a summary of the entire database from the 2010 survey. Access to the complete survey results and previous national surveys are available on-line at http://www.itsdeployment.its.dot.gov. The website also provides access to survey results in the form of downloadable reports, including a survey summary for each survey type and fact sheets. Nearly 1,600 surveys were distributed to state and local transportation agencies in 2010. A total of seven (7) survey types were distributed including: Freeway Management, Arterial Management, Transit Management, Transportation Management Center (TMC), Electronic Toll Collection (ETC), Public Safety Law Enforcement, and Public Safety Fire/Rescue. Among other things, the data collection results indicate that ITS has moved from being experimental to mainstream and interest in continuing investments in ITS continues to be very strong. When asked about future deployment plans, one-third to three-fourths of the different agency types report they will expand current deployments and about half are planning to ...
Date: August 1, 2011
Creator: Gordon, Stephen Reed & Trombly, Jeff
Partner: UNT Libraries Government Documents Department

Basic Research Needs for Clean and Efficient Combustion of 21st Century Transportation Fuels

Description: To identify basic research needs and opportunities underlying utilization of evolving transportation fuels, with a focus on new or emerging science challenges that have the potential for significant long-term impact on fuel efficiency and emissions.
Date: November 1, 2006
Creator: McIlroy, A.; McRae, G.; Sick, V.; Siebers, D. L.; Westbrook, C. K.; Smith, P. J. et al.
Partner: UNT Libraries Government Documents Department


Description: We study routing problems in time-dependent and edge and/or vertex-labeled transportation networks. Labels allow one to express a number of discrete properties of the edges and nodes. The main focus is a unified algorithm that efficiently solves a number of seemingly unrelated problems in transportation science. Experimental data gained from modeling practical situations suggest that the formalism allows interesting compromises between the conflicting goals of generality and efficiency. 1. We use edge/vertex labels in the framework of Formal Language Constrained Path Problems to handle discrete choice constraints. The label set is usually small and does not depend on the graph. Edge labels induct! path labels, which allows us to impose feasibility constraints on the set of paths considered as shortest path candidates. Second, we propose monotonic piecewise-linear traversal functions to represent the time-dependent aspect of link delays. The applications that can be modeled include scheduled transit and time-windows. 3. Third, we combine the above models and capture a variety of natural problems in transportatiou science such as time-window constrained trip-chaining. The results demonstrate the robustness of the proposed formalisms. As evidence for our claims of practical efficiency in a realistic setting, we report preliminary computational experience from TRANSIMS case studies of Portland, Oregon.
Date: January 1, 2001
Creator: Barrett, C. L. (Christopher L.); Bisset, K. R. (Keith R.); Jacob, R. (Riko); Konjevod, G. (Goran) & Marathe, M. V. (Madhav V.)
Partner: UNT Libraries Government Documents Department

Scalable, efficient epidemiological simulation

Description: We describe the design and implementation of a system for simulating the spread of disease among individuals in a large urban population over the course of several weeks, In contrast to traditional approaches, we do not assume uniform mixing among large sub-populations or split the population into spatial or demographic subpopulations determined a priori. Instead, we rely on empirical estimates of the social network, or contact patterns, that are produced by TRANSIMS, a large-scale simulation of transportation systems.
Date: January 1, 2001
Creator: Eubank, S. G. (Stephen G.)
Partner: UNT Libraries Government Documents Department

Needs assessment activity report. Revision 1

Description: As part of a Transportation Management Division task (TMD), the Packaging Programs and Testing Group within Westinghouse Hanford Company (WHC) has assessed the packaging needs of some of the mid- and small-sized US Department of Energy (DOE) sites by visiting them and meeting with their transportation and packaging personnel. To date, ten DOE facilities have been visited. As a result, these sites have been informed of some of the packaging activities that TMD has sponsored and is sponsoring, have been appraised of possible upcoming changes to transportation regulations, have discussed their short-term packaging needs, and have shared unique packaging they have developed which may be of use to other DOE facilities. Program successes include developing a questionnaire that discusses the potential impact of US Department of Transportation (DOT) Docket HM-169A, Transportation Regulations; Compatibility with Regulations of the International Atomic Energy Agency; Notice of Proposed Rule (DOT 1989), discovery of a need for a reusable Type A liquid sample packaging and starting its development within another TMD task, coordinating resources between Fermi Laboratory and Argonne National Laboratory, and widening the distribution of WHC-EP-0558, Test and Evaluation Document for DOT Specification 7A Type A Packaging (WHC 1994).
Date: November 1, 1994
Partner: UNT Libraries Government Documents Department

Simulation framework for intelligent transportation systems

Description: A simulation framework has been developed for a large-scale, comprehensive, scaleable simulation of an Intelligent Transportation System (ITS). The simulator is designed for running on parallel computers and distributed (networked) computer systems, but can run on standalone workstations for smaller simulations. The simulator currently models instrumented smart vehicles with in-vehicle navigation units capable of optimal route planning and Traffic Management Centers (TMC). The TMC has probe vehicle tracking capabilities (display position and attributes of instrumented vehicles), and can provide two-way interaction with traffic to provide advisories and link times. Both the in-vehicle navigation module and the TMC feature detailed graphical user interfaces to support human-factors studies. Realistic modeling of variations of the posted driving speed are based on human factors studies that take into consideration weather, road conditions, driver personality and behavior, and vehicle type. The prototype has been developed on a distributed system of networked UNIX computers but is designed to run on parallel computers, such as ANL`s IBM SP-2, for large-scale problems. A novel feature of the approach is that vehicles are represented by autonomous computer processes which exchange messages with other processes. The vehicles have a behavior model which governs route selection and driving behavior, and can react to external traffic events much like real vehicles. With this approach, the simulation is scaleable to take advantage of emerging massively parallel processor (MPP) systems.
Date: October 1, 1996
Creator: Ewing, T.; Doss, E.; Hanebutte, U. & Tentner, A.
Partner: UNT Libraries Government Documents Department

Phase I privatization, site development, and roads design requirements document

Description: To prepare for the privatization contractor development of their assigned sites, roads and rail system must be extended from the existing area network systems. Various road and rail modification alternatives were investigated through an engineering study, @C-SD-TWR-ES- 004, with the preferred transportation corridors identified. Various Site development alternatives were also investigated, WHC-SD-TWR-ES-003. The preferred alternative, as discussed herein, will: 1. Establish boundaries and set monuments for the two PC sites. All work within each designated site will be by the PC. 2. Assure that the systems to serve each site - Roads and Rail System Modifications, Raw and Potable Water Service, Liquid Effluent Transfer Systems and Electric Power- are integrated with each other to best serve the sites. 3. Identify the corridors for Low Activity Waste (LAW) feed lines from the existing AP Tank Farm to the PC sites. Site development project will prepare these corridors for construction ofthe feed lines by the PC. Ifrequired, these corridors would include room for the optional High Level Waste (HLW) feed line. 4. Perform necessary site earthwork and grading outside of the PC sites. 1.3 DOCUMENT OVERVIEW This DRD will list the documents that will form the basis for design and construction of the roads and rail modifications and site development.
Date: September 30, 1996
Creator: Parazin, R.J.
Partner: UNT Libraries Government Documents Department

Simulations of highway traffic with various degrees of automation

Description: A traffic simulator to study highway traffic under various degrees of automation is being developed at Argonne National Laboratory (ANL). The key components of this simulator include a global and a local Expert Drive Mode, a human factor study and a graphical user interface. Further, an Autonomous Intelligent Cruise Control (AICC) which is based on a neural network controller is described and results for a typical driving scenario are given.
Date: October 1, 1996
Creator: Doss, E.; Hanebutte, U.; Vitela, J.; Brown-VanHoozer, A.; Ewing, T. & Tentner, A.
Partner: UNT Libraries Government Documents Department

Structural safety evaluation of the K Basin railcar and truck applications

Description: There are two rail spurs in the storage/transfer areas of both the K East and K West fuel storage basins. These rail spurs both end at the west edge of the basins. To avoid accidental entry of a railcar into a basin, administrative procedures and rail control hardware have been provided. Based upon a combination of historical documentation and existing adminstrative controls, a maximum credible impact accident was established. Using this design basis accident, the existing rail control hardware was evaluated for structural adequacy. The K Basin rail spurs are embedded in concrete, which permits truck/trailer entry into the same area. Safety issues for truck applications are also addressed.
Date: August 1, 1995
Creator: Winkel, B. V.
Partner: UNT Libraries Government Documents Department