منابع مشابه
Optimal mode changes for highway transportation safety
The problem of designing a decentralized advance hazard warning system for highway transportation systems entails the development of efficient switching controllers. In this paper, we represent the vehicle dynamics by a finite number of modes, each of which is represented by a low order transfer function and a constant time delay. The problem of highway safety analysis then gets translated into...
متن کاملOccupational highway transportation deaths --- United States, 2003--2008.
Highway transportation crashes are the leading cause of fatal injuries in the United States for both workers and the general population (1,2). Prevention of work-related highway transportation deaths, and highway transportation deaths in general, are long-standing public health priorities (1,3). To assess trends and help guide the prevention of occupational highway transportation deaths, CDC an...
متن کاملIntelligent Transportation System/Positive Train Control at Highway-Rail Intersections
Since the mid-1990s, the U.S. Department of Transportation (U.S. DOT) Federal Railroad Administration (FRA) has sponsored research, conducted by the John A. Volpe National Transportation Systems Center of the U.S. DOT Research and Innovative Technology Administration (RITA), aimed at integrating Positive Train Control (PTC) and Intelligent Transportation System (ITS) technologies. The objective...
متن کاملOptimizing Highway Transportation at the United States Postal Service
The United States Postal Service (USPS) delivers more than 200 billion items per year. Transporting these items in a timely and cost-efficient way is a key issue if USPS is to meet its service and financial goals. The Highway Corridor Analytic Program (HCAP) is a tool that aids transportation analysts in identifying cost saving opportunities in the USPS surface transportation network. Use of th...
متن کاملVisualization in Transportation American Association of State Highway and Transportation Officials Prepared by the AASHTO Task Force on Environmental Design A Guide for Transportation Agencies
Numerous State DOTs and consultants whose visualization work is included in this guide.
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ژورنال
عنوان ژورنال: The ANNALS of the American Academy of Political and Social Science
سال: 1924
ISSN: 0002-7162,1552-3349
DOI: 10.1177/000271622411600125