Connected and Automated Vehicles

Streamlining Connected Automated Vehicle Test Data Collection and Evaluation in the Hardware-in-the-Loop Environment

Fu, Zhe
Liu, Hao, PhD
Lu, Xiao-Yun, PhD
2020

Quality data collection, processing, and analysis are foundational to good research, policy making and regulation development. With the rapid development of Connected Automated Vehicles (CAV) technologies, it is urgent for both researchers and policy makers to obtain and evaluate good quality CAV data to better understand CAV impacts. CAV hardware-in-the-loop (HIL) tests can expedite CAV performance evaluation and system implementation. This research aims at equipping an existing HIL test tool with data management functions. To this end, a database instance on MySQL has been integrated...

Evaluation Of Mixed Automated/manual Traffic

Ioannou, Petros
1998

The advance in research and development will make the deployment of automated vehicles a reality in the near future. The principal question is whether these technologies will lead to any benefits in terms of safety, capacity and traffic flow characteristics as they penetrate the current transportation system. Another aspect is how to exploit these technologies in order to achieve benefits without adversely affecting the efficiency of the current transportation system and the drivers who cannot afford them. The penetration of automated vehicles into the existing transportation system will...

Assessing The Safety Benefits Of Automated Freeways

Anwar, Mohammed
Jovanis, Paul P.
1993

This research is aimed at the identification of all types of accidents that have occurred on freeways which may affect the vehicle movement in the assumed automated left lane. The emphasis was on six-lane or more urban freeways. The accident data was obtained from the California TASAS ( Traffic Accidents Surveillance and Analysis System) data base and were used to identify all the accidents that originated outside the potential automated area and which affected movement of traffic in the leftmost lane.

Transitional Platoon Maneuvers In An Automated Highway System

Hedrick, J. K.
Narendran, V. K.
Chang, K. S.
1992

This report deals with an introduction to the control aspect of platoon maneuvers in Automated Highway Systems. The different platoon maneuvers include lane changes, merge procedures and split procedures. The first part of the report consists of a review of the existing literature in this area. The survey is split up into the quasi-synchronous and vehicle follower controller methods of approach to the problem. The subsequent sections deal with the mathematical description of the problem with two representations of the system under study, varying only in level of model complexity. The...

A Token-Ring Medium-Access-Control Protocol with Quality of Service Guarantees for Wireless Ad-hoc Networks

Attias, Roberto
Lee, Duke
Puri, Anju
Tripakis, Starvros
Sengupta, Raja
Varaiya, Pravin
2001

This report describes the design and implementation of a wireless token bus protocol for local area networks. This is the second wireless token passing protocol that has been jointly designed by the PATH program and the faculty and students of the EECS department at UC Berkeley.The first wireless token bus protocol, designed by Duke Lee and Professor Pravin Varaiya, was successfully implemented to provide the wireless network required by an automated vehicle platoon. The token passing mode of wireless medium access control was chosen to provide the delivery time guarantees required by the...

Cooperative Multiple-Sensor Fusion for Automated Vehicle Control

Hedrick, J. K.
Jang, J.
Potier, A.
2004

The number and quality of sensors available for both on-board vehicle and infrastructure-based sensing is increasing while the cost of these sensors is rapidly decreasing. On-board vehicle sensors can be utilized for both individual vehicle safety as well as automated vehicle control. It is becoming imperative that "fusion" techniques be developed, i.e., methods to combine the wide variety of sensors available so that reliable and accurate information can be obtained even though individual sensors may fail or become extremely noisy. The process of sensor fusion combines multiple sensor...

Integration of GPS-aided INS into AVCSS

Farrell, Jay
Barth, Matthew
2000

This report describes the results of an effort to implement and analyze the performance a vehicle control system using control state information obtained from a carrier phase Differential Global Positioning System (DGPS) aided Inertial Navigation System (INS). Keywords: Vehicle Positioning Systems, Global Positioning System, Inertial Navigation, Differential Carrier Phase, Advanced Vehicle Control

Automatic Steering For Conventional Truck Trailers: Development and Assessment of Operating Concepts for Improving Safety, Productivity and Pavement Durability

Tsao, H.-S. Jacob
Dessouky, Yasser
Rangavajhula, Krishna
Zeta, Joseph Benjamin
Zhou, Lihong
2006

Trucking productivity can be significantly increased by moving freight with longer combination vehicles (LCVs). However, LCV operations not only raise safety concerns for the surrounding traffic and the LCV drivers themselves but also can damage roadways and bridges not equipped to support the operations. All the discussion about truck size and weight limitations or about the pros and cons of LCV operations is predicated on the use of conventional tractors and trailers. We however observed that a root cause of several major issues associated with LCV operations is the problem of off-...

Formal Specification And Verification Of The Entry And Exit Maneuvers

Sachs, S. R.
Varaiya, P.
1996

This report studies the technical deployment of an Automated Highway System (AHS), and specifically, the interface between an AHS and Urban Arteries (UA). The report focuses on four tasks: 1) specify physical arrangement, operational procedures for entry/exit, 2) conceptualize functions of transfer zone between the AHS and UA, 3) characterize interaction between AHS and UA, and, 4) propose ways of controlling the interaction.

Throttle And Brake Control Systems For Automatic Vehicle Following

Ioannou, P.
Xu, Z.
1994

In this paper, the authors present several throttle and brake control systems for automatic vehicle following. These control systems are designed and tested using a validated nonlinear vehicle model first and then actual vehicles. Each vehicle to be controlled is assumed to be equipped with sensors that, in addition to its own vehicle characteristics, provide measurements of the relative distance and relative speed between itself and the vehicle in front. Vehicle-to- vehicle communication required for the stability of the dynamics of a platoon of vehicles with desired constant intervehicle...