Connected and Automated Vehicles

Position Location in AHS by Magnetic Pseudo-Noise Signals

Bana, Soheila V.
Varaiya, Pravin
1999

This paper proposes a novel method for position location by automated vehicles in AHS. The proposed positioning system meets the desired accuracy for AHS and is economically feasible because it takes advantage of the infrastructure and characteristics of the automated roads. This positioning system is very similar to GPS in the sense of using pseudo-noise codes for range measurement. The phase of a pseudo-noise signal can be mapped to the receiver's range from a reference point where the signal correlation properties in sure accurate phase estimation. The magnetic markers that are...

Ventura/Lompoc Smart Card Demonstration Evaluation: Final Report Volume 1 Technical Performance, User Response, and Institutional Analysis

Giuliano, Genevieve
Moore, II, James E.
Golob, Jacqueline
1999

This report presents evaluation results of the Smart Card Phase III FieldDemonstration. Its purpose is to demonstrate the feasibility of using Smart Cards and othertechnology to provide an integrated fare medium across several transit operators. TheDemonstration took place from May 1995 through June 1997, and it was located in VenturaCounty, California. Participants included seven transit agencies, with the Ventura CountyTransportation Commission acting as the lead local agency. The technology deployed is anintegrated fare transaction and vehicle management/monitoring system, termed...

Advancing Research in Transportation and Public Health: A Selection of Twenty Project Ideas from a US Research Roadmap

Dannenberg, AL
Rodriguez, D
Sandt, LS
2021
Transportation policies and projects have multiple impacts on health. Research on these impacts can help promote positive and reduce adverse health consequences of decisions made by transportation agencies. In 2019 the U.S. National Cooperative Highway Research Program published a research roadmap for transportation and public health based on an extensive literature search and key informant interviews. The roadmap identified 44 research gaps and 122 research needs on a wide range of relevant topics. From this list, using pre-established criteria including specificity, equity, potential impact...

Integrated Maneuvering Control Design And Experiments: Phase II

Hedrick, J. K.
Pantarotto, M.
Yoshioka, T.
Chen, Y.
Connolly, T.
Narendran, V. K.
1996

This report begins with an examination of autonomous lateral vehicle control. This is followed by a section on Cooperative Intelligent Cruise Control (CICC). The effect of communication delays on the control performance of vehicle platoons is then examined. The report concludes with a study of the three basic transition maneuvers in an Automated Highway System: join, split, and lane change.

Issues In Fault Tolerant Control Of Vehicle Follower Systems

Hedrick, J. K.
Garg, V.
1994

The aim of this report is to study issues concerning fault detection and identification in vehicle follower control. The report discusses various potential fault modes among sensors, and actuators used in the vehicle following experiments in cars. It deals with issues of fault detection of sensors and actuators for vehicle following applications.

Development and Performance Evaluation of AVCSS Deployment Sequences to Advance from Today's Driving Environment to Full Automation

Shladover, Steven
VanderWerf, Joel
Miller, Mark A.
Kourjanskaia, Natalia
Krishnan, Hariharan
2001

This report presents the findings of its investigation into deployment sequences to better understand the paths that could be taken from today's driving environment to vehicle-highway automation. One of the most vexing problems has always been that of determining how to advance from the present-day manually-controlled vehicles to the future fully automated vehicles. Considerable research attention has been devoted to defining the architecture and operating protocols, as well as the technology, of automated highway systems. Rather less attention has been devoted to defining the steps by...

Object Management Systems

Gollu, Aleks Ohannes
1995

This thesis describes a new approach for developing large-scale object- oriented software systems, called Object Management Systems (OMS). The OMS development methodology consists of four stages: Domain Customization, System Architecture, Application Development, and System Test. The methodology is demonstrated by implementing the SmartAHS simulation framework, a Customized Object Model. SmartAHS is used to capture different Automated Highway System (AHS) designs and benchmark scenarios and to generate performance metrics through micro-simulation of the designs. The California PATH Program...

A Staggered-diamond Design For Automated/manual - Hov Highway-to-highway Interchange

Tsao, Jacob
1995

This paper proposes a staggered-diamond design for automated connector ramps for an Automated Highway System (AHS). After describing the main features of this design, the paper discusses the constraints on AHS operational design imposed by the requirement for continuous automated highway-to-highway driving. The constraints on AHS evolution due to the same requirement are then discussed.

Analysis of Traffic Flow With Mixed Manual and Intelligent Cruise Control Vehicles: Theory and Experiments

Bose, Arnab
Ioannou, Petros
2001

During the last decade considerable research and development efforts have been devotedto automating vehicles in an effort to improve safety and efficiency of vehicular traffic.While dedicated highways with fully automated vehicles is a future objective, theintroduction of Intelligent Cruise Control (ICC) vehicles on current highways designed tooperate with manually driven vehicles is a realistic near term objective. The purpose ofthis report is to analyze the effects on traffic flow characteristics and environment whenICC vehicles with automatic vehicle following capability (in the same...

Modeling And Control Of Articulated Vehicles

Chen, Chieh
Tomizuka, Masayoshi
1997

This report focuses on dynamic modeling and lateral control of commercial heavy-duty vehicles for highway automation. Two types of dynamic models are developed in the study of lateral control of tractor-semitrailer vehicles in an Automated Highway System (AHS): a complex simulation model and two simplified control models. Two control algorithms for lateral guidance are designed. The first is a baseline steering control algorithm and the second is a coordinated steering and independent braking control algorithm.