PATH

Integrated Maneuvering Control Design And Experiments: Report For Phase III

Hedrick, J. K.
Yoshioka, T.
Chen, Y. H.
Connolly, T.
Shen, L. R.
1997

In this report, a Cooperative Intelligent Cruise Control (CICC) System is proposed to increase highway capacity and provide safety and comfort to drivers. The method requires an automatic throttle and brake control and simple infrastructure-vehicle communication. The system is designed to let a vehicle operate under a conventional cruise control system as well as a distancing control system. The performance of the CICC is evaluated through simulations with a non-linear vehicle model.

Validation of Daganzo's Behavioral Theory of Multi-Lane Traffic Flow: Final Report

Banks, James H.
Amin, Mohammad R.
Cassidy, Michael
Chung, Koohong
2003

A study was conducted to verify C. F. Daganzo's behavioral theory of multi-lane traffic flow (1, 2). This study was conducted by teams from San Diego State University and the University of California at Berkeley who worked independently on a series of case studies to test predictions derived from the theory. The results of the study suggest that some of the phenomena predicted by Daganzo do occur, but not at all locations, and that the underlying behavioral assumptions are oversimplified. Specifically, the types of flow- density (or flow-occupancy) relationship assumed by Daganzo were...

Bus Rapid Transit and the use of AVL Technology: A Survey of Integrating Change

Gillen, David
Johnson, Doug
2002

AVL represents a radical change to many working in the public transit industry. When a new technology is introduced factor proportions change, responsibilities are altered and procedures change. There are threats to lines of authority, job security and responsibility. In all cases there are threats and the successful implementation of a new technology into any firm requires that it be managed, it will not happen automatically and ultimate success of the firm will be contingent on the implementation. The adoption of new technologies has always presented challenges for managers, employees,...

Liability and Regulation of Autonomous Vehicle Technologies

Kalra, Nidhi
Anderson, James
Wachs, Martin
2009

Autonomous vehicle technologies and advanced driver-assistance systems have the potential to significantly improve transportation safety and efficiency, and, collectively, they may offer tremendous social, economic, and environmental benefits. As these technologies increasingly perform driving functions, they also create a shift in responsibility for driving from the driver to the vehicle itself. This motivates a new look at liability and regulatory regimes because of the increasing uncertainty about what should happen when the inevitable crash occurs and the implications for the adoption...

Automated Travel Time Measurement Using Vehicle Lengths from Loop Detector Speed Traps

Coifman, Benjamin
Cassidy, Michael
2000

This report presents a vehicle reidentification algorithm for consecutive detector stations on a freeway, whereby a vehicle measurement made at a downstream detector station is matched with the vehicle's corresponding measurement at an upstream station. The algorithm should improve freeway surveillance by measuring the actual vehicle travel times; these are simply the differences in the times that each (matched) vehicle arrives to the upstream and downstream stations. Thus, it will be possible to quantify conditions between widely spaced detector stations rather than assuming that the...

Expedited Crash Investigation - With Use of Technologies for Documentation and Processing

Chan, Ching-Yao
Lian, Thang
Ko, Jeff
2007

The mobility and efficiency of California highways are impeded by the recurrent and non-recurrent congestion on a daily basis. Roadway incidents, especially collisions, often result in traffic congestion and travel delays. This project is initiated to explore the use of technologies that will potentially bring direct and immediate benefits to the law enforcement officers and other personnel who are involved in the handling of collision sites and subsequent investigations. The work carried out in this project includes three major components: (1) The experimentation of integrated vehicular...

The Costs and Benefits of Telecommuting: A Review and Evaluation of Micro-Scale Studies and Promotional Literature

Shafizadeh, Kevan R.
Mokhtarian, Patricia L.
Niemeier, Debbie A.
Salomon, Ilan
2000

This literature review has been prepared to synthesize and assess previous small-scale economic evaluations of telecommuting. These small-scale studies can be categorized as telecommuting pilot projects that take into account telecommuter and employer costs and benefits. (The reader is referred to a 1998 review of macro-scale telecommuting literature by Shafizadeh et al.). In this report, four studies are selected and examined as representing the state of practice regarding methodology and assumptions. The report identifies common inputs, critical assumptions, and limitations of these...

Expedited Crash Investigation - With Use of Technologies for Documentation and Processing

Chan, Ching-Yao
Lian, Thang
Ko, Jeff
2007

The mobility and efficiency of California highways are impeded by the recurrent and non-recurrent congestion on a daily basis. Roadway incidents, especially collisions, often result in traffic congestion and travel delays. This project is initiated to explore the use of technologies that will potentially bring direct and immediate benefits to the law enforcement officers and other personnel who are involved in the handling of collision sites and subsequent investigations. The work carried out in this project includes three major components: (1) The experimentation of integrated vehicular...

EasyConnect II: Integrating Transportation, Information, and Energy Technologies at the Pleasant Hill BART Transit Oriented Development

Rodier, Caroline
Shaheen, Susan A.
Blake, Tagan
Lidicker, Jeffrey R.
Martin, Elliot
2010

Smart growth policy strategies attempt to control increasing auto travel, congestion, and vehicle emissions by redirecting new development into communities with a high-intensity mix of shopping, jobs, and housing that is served by high-quality modal alternatives to single occupant vehicles. The integration of innovative technologies with traditional modal options in transit-oriented developments (TODs) may be the key to providing the kind of high-quality transit service that can effectively compete with the automobile in suburban transit corridors. A major challenge, however, of such an...

Capacity Of Automated Highway Systems: Effect Of Platooning And Barriers

Tsao, H. S. Jacob
Hall, Randolf
Hongola, Bruce
1994

In this paper, the authors study the capacity of key Automated Highway Systems (AHS) operating scenarios. The effect of the lane-flow rule, platooning or free-agent, as well as the lane barriers, on AHS capacity are studied. Special attention is paid to the interaction between the lane-flow rule and the lane change requirement. The paper consists of two major components, analytical models and AHS simulation. After a brief introduction of AHS operating strategies, analytical models are developed for general AHS. For simulation, the authors focus on a segregated AHS that has one automated...