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Lean Machines: Preliminary Investigations

Garrison, William Louis
Pitstick, Mark E.
1990

This report provides information on a study assessing the potential for the transition of the fleet of highway vehicles to lean vehicles (General Motors Lean Machine). The report provides information on the organization of the study and the results of preliminary explorations of parking, ownership and operating, and highway capacity topics. In addition, a discussion paper provides a broad brush treatment of topics bearing on the adoption and use of the lean vehicles in California.

Inter-technology Effects in Intelligent Transportation Systems

Levinson, David M.
Kanchi, Seshasai
Gillen, David
2002

This project examines the expected benefits of varying combinations of ITS applications: Freeway Service Patrol, Changeable Message Signs, and Ramp Metering. The research analyzes the simulated results of a stylized network in a microscopic traffic simulator. The traffic network includes parallel roadways, ramp meters and changeable message signs.We have tested these technologies in various combinations. We measure effectiveness and define a measure of inter-technology economies.In brief, it is found that additional technologies are sub-additive, and more benefits come from each technology...

An Investigation in the Use of Inductive Loop Signatures for Vehicle Classification

Sun, Carlos
2000

This final report describes an advanced traffic surveillance technique based on pattern recognition and the use of current inductive loop technology. The focus of the investigation was a study of the feasibility of using inductive loop signatures for obtaining vehicle classification information on a network-wide level.

Red-Light-Running Collision Avoidance

Grembek, Offer
Zhou, Kun
Zhang, Wei-Bin
2009

Red light running (RLR) problem has been recognized as a significant safety problem in California as well as throughout the United States. This paper follows a two step process to develop enhanced signal timing models for possible reduction of RLR. In the first step, field data are collected with one-second resolution and discrete choice models are estimated to determine the significant influencing factors of RLR; in the second step, based on the findings from the first step, T7F software package as well as custom designed programs is used to find the enhanced signal timing plans that can...

Analysis, Design, And Evaluation Of Avcs For Heavy-duty Vehicles With Actuator Delays

Yanakiev, Diana
Eyre, Jennifer
Kanellakopoulos, Ioannis
1998

This report focuses on the design of longitudinal control algorithms for commercial heavy vehicles (CHVs). The algorithms use nonlinear spacing policies, backstepping control design, and aggressive prediction schemes to deal with the presence of significant delays and saturations in the fuel and brake actuators. The algorithms can also deal with delays both in the presence and in the absence of intervehicle communication. A by-product on this research is the development of two software packages, Platoon-Builder and TruckVis, for simulation and animation of CHV platoons. Additionally,...

Cooperative Collision Warning Systems: Concept Definition and Experimental Implementation

Sengupta, Raja
Rezaei, Shahram
Shladover, Steven E.
Cody, Delphine
Dickey, Susan
Krishnan, Hariharan
2006

The concept of cooperative collision warning (CCW) systems is introduced and explained, followed by presentation of experimental results showing the performance of a first prototype CCW system. The CCW concept provides warnings or situation awareness displays to drivers based on information about the motions of neighboring vehicles obtained by wireless communications from those vehicles, without use of any ranging sensors. This has the advantages of a potentially inexpensive complement of onboard vehicle equipment (compared to ranging sensors that could provide 360 degree coverage), as...

ITS Decision Enhancements: Developing Case-Based Reasoning and Expert Systems and Incorporating New Material

Dahlgren, Joy
Khattak, Asad
McDonough, Patrick
Banerjee, Ipsita
Orrick, Phyllis
Sharafsaleh, Ashkan
2004

The ITS Decision website has been developed for the user who is interested in learning about various Intelligent Transportation System (ITS) technologies. Two tools have been developed that will help those users who wish to address a specific problem, obtain information relating to their particular context. These are the Expert System and the Case Based Reasoning tools. The Expert System tool queries the user on the problem context and the problem in general. It then presents information on different types of ITS technologies that may be used to address the problem. The Case-Based...

A First Investigation of Truck Drivers’ On-the-Road Experience Using Cooperative Adaptive Cruise Control

Yang, Shiyan
Shladover, Steven E.
Lu, Xiao-Yun
Spring, John
Nelson, David
Ramezani, Hani
2018

Cooperative Adaptive Cruise Control (CACC) is a driver assist technology that uses vehicle-to-vehicle wireless communication to realize faster braking and acceleration responses in following vehicles and shorter headways compared to Adaptive Cruise Control (ACC). This technology not only enhances road safety, but also offers fuel saving benefits as a result of reduced aerodynamic drag. The amount of fuel savings is dictated by the following distances and the driving speeds. So, the overarching goal of this work is to explore truck drivers’ preferences and behaviors when following in “CACC...

Evaluation Of The I-110 Corridor Smart Card Demonstration Project

Giulian, Genevieve
Moore, II, James
1996

This report presents an evaluation of the Phase II Smart Card Demonstration Project, the goal of which is to develop a transit fare payment system for commercialization that will improve transit efficiency and effectiveness. The major focus of the project is the testing of selected technologies in revenue service. Two types of fare payment cards were selected: a contactless radio frequency (RF) card and a contact card. The advanced fare payment system includes passenger transaction units installed on buses and the associated control and communications system. The evaluation covers the...

Bus Rapid Transit (BRT) Toolbox: BRT Person Throughput-Vehicle Congestion Tradeoffs

Jingquan, Li
Chan, Ching-Yao
Zhou, Kun
Zhang, Wei-Bin
2015

This report documents a research effort to understand the current practice and issues associated with Bus Rapid Transit (BRT) planning and deployment. It reviewed the design options incorporated into existing BRT deployments across California and the nation. The project team interviewed practitioners of California Department of Transportation (Caltrans) Districts and transit agencies to understand the BRT project approval decision-making process, the impacts of BRT implementation and the Measures of Effectiveness (MOEs) for transit and non-transit system performance. The studies revealed...