This study examines the impact of alternative propulsion systems and fuels on the deployment and operation of the Automated Highway System (AHS). Alternative propulsion systems and fuels are compared to the gasoline-fueled spark-ignition engine in the areas of: specific power, drivability, pleasability, emissions, infrastructure support, production
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When an Automated Highway System (AHS) is deployed, its design and operational attributes will differ considerably depending on whether or not commercial and transit vehicles are accounted for. This activity analyzes the implications of commercial and transit operations on an AHS. The physical characteristics of large vehicles are analyzed with reg
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This study considers the influence which automated highway system (AHS) traffic would have on the conventional, non-automated freeway and street system as it approaches and departs from the automated roadway. The higher speeds and capacities possible with an AHS facility will attract traffic into the AHS lane from both the general purpose freeway l
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This activity focuses on the traffic operational impacts of Automated Highway Systems (AHS) entry/exit facilities at the points where they interface with the local street network. Information and results from several of the other Precursor Systems Analyses (PSA) activity areas are utilized in the conduct of the entry/exit research. Various strategi
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This activity addresses highway infrastructure topics that will be encountered when an automated highway system (AHS) is deployed. AHS right-of-way requirements were analyzed, based on the following criteria: width of AHS vehicle, ability of the system to keep the vehicle on the desired path, barrier width (for dedicated systems), presence or absen
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The program described by this eight-volume report , a resource materials document type, identified the issues and risks associated with the potential design, development, and operation of an Automated Highway System (AHS), a highway system that utilizes limited access roadways and provides "hands off" driving. The AHS effort was conducted by a team
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The program described by this eight-volume report, a resource materials document type, identified the issues and risks associated with the potential design, development, and operation of an Automated Highway System (AHS), a highway system that utilizes limited access roadways and provides "hands off" driving. The AHS effort was conducted by a team
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The program described by this eight-volume report, a resource materials document type, identified the issues and risks associated with the potential design, development, and operation of an Automated Highway System (AHS), a highway system that utilizes limited access roadways and provides "hands off" driving. The AHS effort was conducted by a team
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The program described by this eight-volume report, a resource materials document type, identified the issues and risks associated with the potential design, development, and operation of an Automated Highway System (AHS), a highway system that utilizes limited access roadways and provides "hands off" driving. The AHS effort was conducted by a team
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An Automated Highway System (AHS) is the most advanced and highest risk element of the overall program on Intelligent Transportation Systems. The objectives of this study are: to identify the issues that the implementation of AHS entry and exit must address, to arrive at firm or tentative conclusions about those issues, and to indicate the uncertai
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United States. Department of Transportation. Federal Highway Administration
1994-11-01
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PDF
This report investigates issues and risks related to roadway infrastructure deployability of automated highway systems in both urban and rural settings in the context of case studies of existing freeway corridors in California. The overall conceptual structure of the research is that of a Baseline Study followed by Case studies.
Researchers from the member campuses of the California PATH Program have conducted research in four of the PSA Activity Areas. These research projects have been complementary to the extensive Automated Highway System (AHS) research already underway within the PATH Program, addressing topics that have not yet been addressed within the main body of t
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This activity area report presents a preliminary control systems analysis of each of the Representative System Configurations (RSC’s) in terms of expected performance, feasibility, complexity, effect on system safety, roadway capacity, driver involvement, operation, and maintainability. Communication systems and sensors are also discussed in their
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The program described by this eight-volume report, a resource materials document type, identified the issues and risks associated with the potential design, development, and operation of an Automated Highway System (AHS), a highway system that utilizes limited access roadways and provides "hands off" driving. The AHS effort was conducted by a team
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This manual provides sequential, illustrated steps for performing the SUPERPAVE test procedures on asphalt mixtures, level 1 design. It also serves as a self-contained laboratory reference document on those procedures. These tests and procedures represent the results of the SHRP 5 -year research effort to investigate and improve asphalt mix design
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The objective of this report is to develop and test methodologies for computing energy losses at junction manholes. Laboratory data obtained over a 6-year period at the Federal Highway Administration's (FHWA's) Hydraulics Laboratory are analyzed within the framework of three methodologies: the energy grade line, power loss, and neural networks. Des
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The objective of this report is to develop and test methodologies for computing energy losses at junction manholes. Laboratory data obtained over a 6-year period at the Federal Highway Administration's (FHWA's) Hydraulics Laboratory are analyzed within the framework of three methodologies: the energy grade line, power loss, and neural networks. Des
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This instructor's guide is designed for a 2 to 4 hour long workshop on design, construction, and performance of micro-surfacing. This workshop will be useful to Federal Highway Administration, State, and local highway agency engineers who require knowledge of micro-surfacing. Micro-surfacing consists of polymer-modified asphalt emulsion, 100% crush
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This guidebook is designed to be a hands-on, planner-friendly document that answers hard questions about intermodal management system planning in practice. The guidebook is written from the perspective of the Commonwealth of Massachusetts' development of its statewide intermodal management system (IMS) work plan, which includes coordination with al
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