PATH

During the last decade considerable research and development efforts have been devoted to automating vehicles in an effort to improve safety and efficiency of vehicle following. While dedicated highways with fully automated vehicles is a far in the future

Bose, Arnab
Ioannou, Petros
1999

During the last decade considerable research and development efforts have been devoted to automating vehicles in an effort to improve safety and efficiency of vehicle following. While dedicated highways with fully automated vehicles is a far in the future objective, the introduction of semi-automated vehicles on current highways designed to operate with manually driven vehicles is a realistic near term objective. The purpose of this paper is to analyze the effects on traffic flow characteristics and environment when semi-automated vehicles with automatic vehicle following capability (in...

Davis Smart Mobility Model Project: Initial Scoping and Planning Study

Shaheen, Susan A.
Finson, Rachel S.
2003

The goal of the Davis Smart Mobility Model project is to optimize individual mobility options through improved connectivity among modes, enhanced techniques to link land-use planning and transportation system design, advanced information technologies, and clean-fuel vehicles. The California PATH/Caltrans partnership with the University of California, Davis (UC Davis) started when campus planners expressed interest in learning how innovative mobility services and technologies (such as carsharing and smart parking management) might help to alleviate the transportation impacts of a campus...

Highway Electrification And Automation Technologies - Regional Impacts Analysis Project: Phase III Appendices: Mobility Statistics

Scag
Path
1993

This report presents appendices to the third, and final, phase of the Highway Electrification and Automation Technologies Regional Impacts Analysis Project (HE&A). The focus of Phase III report is the assessment of regional impacts associated with application of roadway electrification, and automation technologies to selected freeway sections in the Southern California region.

Trajectory Design And Implementation Of Longitudinal Maneuvers On AHS Automated And Transition Lanes

Chen, Pin-yen
Alvarez, Luis
Horowitz, Roberto
1997

In this report, the authors present a modified safe join trajectory for the regulation layer maneuvers of the hierarchical PATH Automated Highway System (AHS) architecture. This new design presents a more conservative behavior for the controlled platoon in a maneuver. The new trajectory reduces the chance of having a collision when the platoon ahead applies and holds maximum braking.

Freeway Service Patrol (fsp) 1.1: The Analysis Software For The Fsp Project

Petty, Karl
1995

This document is a reference manual for the fsp and xfsp programs. The fsp program is a software tool used to interrogate the data that was collected during the Freeway Service Patrol Evaluation Project. The purpose of the program is to perform diagnostics on the data, generate error reports, and make plots of various pieces of data. The xfsp program is a graphical user interface to the fsp program. It allows the user to create the runfile and the incident filter that the fsp proram requires by pointing and clicking on various butons and widgets with the mouse.

Lane Assist Systems for Bus Rapid Transit, Volume I: Technology Assessment

Shladover, Steven E.
Zhang, Wei-Bin
Jamison, Doug
Carey, Graham
Viggiano, Stefano
Angelillo, David
Cunradi, Jim
Sheehan, Brian
Schumacher, Dave
Oropeza, Maurilio
Hardy, Matthew
Kulyk, Walter
Gross, Yehuda
2007

This report documents the information collected by an FTA-led delegation to several European organizations that have had experience in the development and operation of transit lane assist systems based on three different technologies, including (1) optical guidance in Rouen, France, (2) magnetic guidance in Eindhoven, Netherlands and (3) mechanical guidance in Essen, Germany. It includes summaries of the briefings prepared by the European hosts in response to questions from the delegation, the discussions the delegation had with their hosts and observations based on riding the systems in...

Institutional Challenges to the Development and Deployment of ITS/ATS Systems in California

Horan, Thomas A.
Hempel, Lamont C.
Bowers, Margo
1995

This report provides an overview of the key institutional challenges that could affect the development and deployment of Intelligent Transportation Systems/Advanced Transportation Systems (ITWATS) technologies in California. The findings of the study are based on a series of in-depth interviews and review of research related to “non-technical” constraints both in California and at the national level. Based on this review, the study outlines three core areas that require attention: research collaboration--which focuses on public/private partnerships in the development of new technologies;...

Aggregation of Direct and Indirect Positioning Sensors for Vehicle Guidance

Agogino, Alice
Chao, Susan
Wang, Jiangxin
Deng, Xinyan
2000

Advanced Vehicle Control Systems (AVCS) require large numbers of sensors for different levels within the control hierarchy. Whereas all sensors contain uncertainty to some degree, different sensors are particularly useful for specific environmental conditions. Therefore, sensor redundancy is essential to achieving high sensor data fidelity for use in real-world, non-ideal, unpredictable environments. In this work, a positioning sensor system, which includes Global Positioning System (GPS) receivers, a radar sensor, and a linear transducer is investigated. Positioning sensors provide...

An Optimal Resource Allocation Tool for Urban Development Using GIS-based Accessibility Measures and Stochastic Frontier Analysis

Goulias, Konstadinos G.
2007

Assessments of transportation investment from a “social efficiency” viewpoint are absent from transportation policy analysis and marketing practice. This is mainly due to the lack of tools capable to assess the role of transportation infrastructure investment on the provision of activity opportunities to residents of each locality. In this report, we demonstrate a tool that identifies specific locations in an entire state where resource allocation has succeeded in maximizing benefits to the public. In addition, the tool and the Geographic Information System maps derived from this tool show...

ITS And The Environment: Issues And Recommendations For Its Deployment In California

Horan, T. A.
Hempel, L. C.
Jordan, D. R.
Alm, E. A.
1996

This study culminates a two year, multi-faceted inquiry into the environmental issues associated with Intelligent Transportation Systems ( ITS). In addition to reviewing the literature on ITS-related environmental issues, the report presents results from three focus groups that explored the attitudes of California environmental stakeholders about ITS. The report also addresses public acceptance issues related to ITS, focusing on public acceptance of Advanced Traveler Information Services (ATIS), congestion pricing, and telecommuting. The report concludes with summary results and...